At dim light levels, rods are responsible for vision (scotopic vision). At bright light levels, cones become active (photopic vision).
what are rods and cones?
Rods and cones are the two categories of photoreceptors found in the human retina that collect light. Cones are in charge of vision at higher light levels, whereas rods are responsible for vision in low light. Mesopic light levels are those where both are usable.
Rods Lacking in spatial acuity and unable of mediating color, they are capable of scotopic vision (low light levels). The retina's outer edges are densely populated. They are rod-shaped, which helps with nighttime or low light vision. Include the vitamin A-rich pigment rhodopsin, which is important for night vision and makes rods sensitive to light.
Cones are responsible for excellent spatial acuity, photopic vision (higher light levels), and color perception. Most often observed in retina, they are primarily inhabited in the central fovea region. Conical in shape, they aid in the distinction of color and other subtle characteristics.
Long-wavelength sensitive cones (L-cones), middle-wavelength sensitive cones (M-cones), and short-wavelength sensitive cones are the three categories (S-cones). These are made up of violet-colored iodopsin pigment.
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How can a change in one cycle affect all of the other cycles?
A change in one cycle can affect the other cycles because most ( if not all ) cycles on Earth are related in one way or another.
How are natural cycles related ?The natural cycles on Earth are related to each other because they often draw their energy from the same source which is the atmosphere, the oceans, and the Earth's crust . They also draw their energy from the sun as well .
For instance, the carbon cycle is related to the water cycle because water helps in the transportation of carbon to other areas where organisms can use it . It also helps in the weathering of rocks that contain carbon, thereby releasing it .
This means that a change in one cycle can affect the other cycles in nature if the change interferes with the way that cycle relates to other cycles .
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Classify the key elements of replication, transcription, and translation according to the process to which they belong.RNA polymeraseexons and intronsribosomesprimersokazaki fragmentsDNA polymeraseaminoacyl-tRNAspromotercodons and anticodons
Using the existing strand as a template, DNA polymerase joins nucleotides to create a new strand. By using RNA polymerase, transcription involves creating new mRNA from DNA base sequences. On ribosomes, polypeptides are created during translation.
There are three steps to the process: commencement, elongation, and termination. After the DNA is created, it goes through a process called transcription to create messenger RNA, which is later used to produce proteins. The initial stage in unlocking a cell's genetic code is transcription.
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What is sea farming?
Answer: Aquaculture (sea farming) is the cultivation of aquatic animals and plants in controlled environments.
Explanation:
Seawater farming addresses the severe lack of freshwater and undesirable soil conditions for agricultural activities in coastal regions. Saltwater, instead of freshwater, can be used to directly support a wide range of sustainable agricultural activities and enrich the soils in the coastal regions.
Answer: um well its kinda like ----- when animals and plants are controlled environments of farming seaweed and shellfish well it's like water based farming
Explanation: hope it helps
TRUE/FALSE. the middle pleistocene humans are morphologically diverse and broadly dispersed throughout time and space.
Ancestors of contemporary humans. Morphologically, Middle Pleistocene people are. various and far scattered over both time and space.
During the Pleistocene, did people exist?Throughout the Pleistocene, the hominid line continued to develop. About 100,000 years ago, a first anatomically modern arose. As human populations grow and spread into new areas, many experts believe that early humans had an influence on other animal species through hunting.
How did the Pleistocene epoch develop?The most recent ice ages, or events of global cold, occurred during the Pleistocene. During chilly epochs, a large portion of the temperate zones of the planet was alternately covered by glaciers, emerging during warmer interglacial epochs when the glaciers receded.
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When the concentration of ___
in tissue fluid is too high, intracellular fluid moves into the extracellular fluid compartment.
sodium ions
cesium particles
soluble fibers
immature osteoblasts
When the concentration of sodium ions in tissue fluid is too high, intracellular fluid moves into the extracellular fluid compartment.
What is Intracellular fluid?
The fluid that resides within of cells is called intracellular fluid. The fluid located outside of cells, or extracellular fluid, is known as interstitial fluid. Extracellular fluid is classified into two categories: fluid found in blood and fluid found outside blood.
Phosphorus (PO4 P O 4 ), magnesium (Mg2+ M g 2 +), and potassium (K+) are a few of the major electrolytes found in intracellular fluid.
Therefore, Option A is correct.
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Gonorrhea is a sexually transmitted disease. The male complains of __________ and the female complains of __________.
Gonorrhea is a sexually transmitted disease, the male complains of swollen testicles and the female complains of yellowish vaginal discharge.
What is a sexually transmitted disease?Gonorrhea in males can result in a painful infection in the testicles and prostate gland, which in a small percentage of instances may impair fertility.
In a small percentage of cases, untreated gonorrhea can spread through the bloodstream and result in life-threatening infections in other body areas (sepsis).
Therefore, for a number of reasons, women in particular are more likely than males to get gonorrhea, syphilis, and chlamydia.
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White patches on the surface of the tongue and the oral mucosa accompanied by inflammation and swelling are signs consistent with
A. zygomycosis
B. cryptococcosis
C. paracoccidioidomycosis
D. sporotrichosis
E. candidiasis
White patches on the surface of the tongue and the oral mucosa accompanied by inflammation and swelling are signs consistent with candidiasis. Correct answer: letter E.
Because Candidiasis is caused by overgrowth of the yeast Candida, which occurs naturally in the mouth.
What is candidiasis?Is an infection caused by a type of yeast called Candida. It can affect different parts of the body, including the skin, mouth, throat, and genitals. Symptoms may include:
ItchingBurningChanges in the appearance of the affected area.Treatment typically involves antifungal medications.
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Describe a hypothesis that explains the species area relationship
what interaction is involved in the stimulation of a helper t cell?
Answer:
costimulatory reaction between a signaling protein known as B7
The connection between CD4 and the MHC II protein and the engagement of the T cell receptor with processed antigen.
What is the stimulation of a T cell?A CD4 receptor can be found on the surface of helper T-cells. Major Histocompatibility Complex (MHC) class II molecules and the CD4 receptor interact.
T helper cells are activated by the interaction between T-cell receptors (TCR) and peptide MHC class II molecules (pMHC II),
Which are expressed on the surface of antigen-presenting cells (APCs). such as DCs, mononuclear phagocytes, some endothelial cells, thymic epithelial cells, and B cells.
Therefore, CD4 and the MHC II, interaction is involved in the stimulation of a helper t cell.
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cam plants keep stomates closed in the daytime, thus reducing loss of water, they can do this because they
Crassulacean acid metabolism (CAM) plants keep stomata closed in the daytime to minimize photorespiration during photosynthesis.
Some plants are able to adapt in dry environment, such as cacti and pineapples. These plants use Crassulacean acid metabolism (CAM) to minimize photorespiration. This process is different with C3 and C4 plant.
Photorespiration is a pathway that competes with the Calvin cycle. It occurs as the rubisco acts on oxygen rather than carbon dioxide. Photorespiration causes sugar synthesis is decrease.
To prevent photorespiration, CAM plants open their stomata at night, allowing carbon dioxide to diffuse into the leaves. This carbon dioxide then converted to organic acid (malate). This organic acid will be stored until the next day. In daylight, CAM plants don’t open their stomata because the organic acid are go out of the vacuole and broken down for releasing carbon dioxide and enter Calvin cycle. It maintains a high concentration of carbon dioxide.
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How does an early onset of spring through climate change affect plants?
Earlier spring onset might also reason phenological mismatches among the supply of plant sources and dependent animals and potentially lead to extra fake springs when the next freezing temperatures harm new plant growth.
vegetation that might be tormented by weather exchange tends to have a developing and flowering season that begins very early and lasts longer than normal. This actually puts an imbalance within the environment which reasons many environments to have a special stake in the demand and delivery of food for another number one and secondary purchasers.
The early onset of spring influences the plant's budding time which might then expand to early improvement of end result and afterward will progress to a lack of delivery while the want for that meal arises for other organisms.
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which of the following factors are needed for an organism to be successfully classically conditioned?
-contingency
-contiguity
-blocking
-generalization
The following factors are needed for an organism to be successfully classically conditioned is contingency, contiguity.
Describe contingency using an example?A contingency is the possibility of a negative future occurrence, such as a pandemic, economic downturn, natural disaster, fraud, or terrorist attack.
What is a different word for a contingency?Contingency is frequently used interchangeably with the words crisis, emergency, exigency, junction, pinch, strait, and strait. All of these words refer to "a critical or vital time or state of things," but the word "contingency" denotes an emergency or urgency that is viewed as probable but unlikely to occur. planning for emergencies.
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the triads of a muscle fiber consist of __________.
The triads of a muscle fiber consist of the T-tubule surrounded by two terminal cisternae of the sarcoplasmic reticulum.
What is Muscle fiber?Muscle fiber may be characterized as large multinucleated cells. These cells most obviously express histological features in cross-striations. The cytoplasm of these cells may contain many myofibrils that significantly include tiny cylinders consisting of bundles of myofilaments.
The sarcoplasmic reticulum is a special structure in muscle cells that holds and releases calcium. Due to this, the function of muscle fiber may become more specific as compared to other fibrous cells.
Therefore, the triads of a muscle fiber consist of the T-tubule surrounded by two terminal cisternae of the sarcoplasmic reticulum.
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The following F1 cross is made: BBGg x Bbgg. Which is not a possible outcome in the F2 generation?
`When the cross of BBGg x Bbgg is made then in this situation the gametes that are formed from BBGg are BG,Bg and from Bbgg is Bg,bg are BBGg,BBgg,BbGg and Bbgg. The four outcomes are BBGg,BBgg,BbGg and Bbgg and the homozygously dominant and the recessive is absent.
What is homozygous ?It is the situation in which the same types of gametes are present.
In the cross of BBGg x Bbgg the gametes that are absent will be the homozygous dominant condition and the homozygous recessive as well. BBGg,BBgg,BbGg and Bbgg are the gametes that are all heteroygous.
Heterozygous condition is the condition in which different gametes are present that is different different situation is present and the gametes in the offspring are totally different.
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Why can't yeasts produce ATP anaerobically indefinitely?
Yeasts can't produce ATP anaerobically indefinitely because at higher levels ethanol is a toxic waste product and causes cell disruption of yeasts.
What are yeasts?
Yeast, one of about 1,500 species of unicellular fungi, most of which belong to the phylum Ascomycota and a few to the phylum Basidiomycota. Yeast fungi are found on soils and plant surfaces worldwide and are especially common in sugar-rich media such as floral nectar and fruits.There are hundreds of economically important Ascomycota yeast cultivars. Species commonly used in the production of bread, beer and wine are selected strains of Saccharomyces cerevisiae. Several yeasts are dangerous pathogens of humans and other animals, most notably Candida albicans, Histoplasma, and Blastomyces.
Therefore, Yeasts can't produce ATP anaerobically indefinitely because at higher levels ethanol is a toxic waste product and causes cell disruption of yeasts.
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gluconeogenesis is the conversion of pyruvate to glucose. several cofactors are needed in this metabolic pathway. the overall unbalanced reaction is shown.
The complete equation to produce 1 glucose equivalent:
2Pyruvate + 2NADH + 4ATP + 2GTP ⇒ 1 glucose + 2NAD⁺ + 4ADP + 2PDB + 6P
Gluconeogenesis is the process of synthesizing or making glucose from non-carbohydrate compounds in the body. This process occurs when glucose levels are not available, so the body converts amino acids or glycerol into glucose to then be used as energy for the body.
Glucose will be made from other non-carbohydrate compounds and molecules, such as:
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T/F. Local zoning ordinances are generally designed to prevent nuisance by segmenting a municipality into zones—industrial, residential, and so forth.
True, Local zoning ordinances are generally designed to prevent nuisance by segmenting a municipality into zones - industrial, residential, and so forth
A municipality's land use regulations are formally categorised in the zoning ordinance. It also establishes the legal foundation. The zoning legislation specifies the sorts of land uses that are authorised and makes these distinctions. Zoning refers to municipal or local ordinances or rules that specify the permitted and prohibited uses of real estate in certain geographic areas. For instance, zoning regulations might restrict the commercial or industrial use of property to stop the construction of oil, manufacturing, and other sorts of companies in residential areas. At order to verify that a business establishment is permitted in the desired location under the Comprehensive Land Use Plan, Zoning Ordinance, and other applicable zoning and land use ordinances, zoning clearance must be obtained prior to applying for a business permit.
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What amino acid sequence would be produced from the dna sequence tac ccc gca agt?.
According to the genetic code, the amino acid sequence that would be produced from the DNA sequence tac ccc gca agt is Tyrosine - Proline - Alanine - Serine.
What is the genetic code?The genetic code is a universal code encrypted in the DNA nucleotide sequence that specifies the amino acids that will be added to the protein during translation.
The genetic code is composed of triplets of nucleotides called codons that indicate specific amine acids during polypeptide synthesis, for example, the codon gca encodes for the amino acids alanine, while ccc encodes for proline.
Therefore, with this data, we can see that the genetic code is a code based on the linear order of nucleotides that are present in a given DNA nucleotide sequence and indicates the amino acids that will be added to the protein during the translation process in the cell.
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Which of the following statements about meiosis and mitosis is true?
a) In meiosis II and mitosis, a diploid cell divides.
b) Meiosis II is similar to mitosis in that sister chromatids of each chromosome separate.
c) In mitosis and meiosis I, homologous chromosomes move independently of each other.
d) Each daughter cell produced during meiosis and mitosis is genetically identical to the parent cell.
Sister chromatids of each chromosome separate during meiosis II, which is identical to mitosis in this regard.
The ideal answer is B.
Which of the following statements concerning meiosis and mitosis is true?What is the correct way to describe meiosis and mitosis? While the byproducts of mitosis are all the same, those of meiosis can vary from one another (except for rare mutations).
How do meiosis and mitosis differ from one another?Meiosis creates cells that are genetically distinct from the parent and have half the amount of DNA as mitosis, which creates two genetically identical "daughter" cells from a single "parent" cell. The majority of cells in the body constantly undergo mitosis, while some do it more frequently than others.
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Label the structures found within a skeletal muscle. Muscle fiber Myofibril Sarcoplasmic reticulum Filaments Perimysium Sarcolemma Epimysium Endomysium Fascia Epimysium Endomysium Fascia Tendon Fascicle Reset
The structures found within a skeletal muscle.
muscle fiberPerimysiumactinTropomyosinTroponinmyosinWhat is skeletal muscle?Skeletal striated muscle tissue is formed by bundles of very long, multinucleated cylindrical fibers known as skeletal striated muscle fibers. These bundles are surrounded by the epimysium, an outer membrane of dense connective tissue. Septa of very thin connective tissue, called perimysium, depart from these membranes, through which blood vessels enter the muscles. They are muscles of voluntary movement.
Myosin is made up of two subunits, light meromyosin and heavy meromyosin. The light meromyosin corresponds to the largest portion of the rod, while the heavy meromyosin is composed of the smallest part of the rod next to the globular projection.
The sarcolemma consists of a cell membrane, called the plasma membrane, and a lining of a thin layer of polysaccharide material, with many thin collagen fibrils.
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Muscle contraction depends on ATP hydrolysis. During periods of intense exercise, muscle cells rely on the ATP supplied by three metabolic pathways: glycolysis, mitochondrial respiration, and the phosphagen system. Figure 1 shows the rates at which the three metabolic pathways produce ATP following the start of an intense period of exercise.
Which of the following correctly uses the data to justify the claim that the phosphagen system is an immediate, short-term source of ATP for muscle cells?
ATP production by the phosphagen system increases and decreases rapidly following the start of the exercise period.
ATP production by the phosphagen system increases and decreases rapidly following the start of the exercise period.
What is ATP?
Adenosine triphosphate (ATP) is the cellular energy source for usage and storage. An adenine-based nitrogenous base, ribose sugar, and three serially bound phosphate groups make up the nucleoside triphosphate structure of ATP. When macromolecules like proteins and lipids are moved into and out of the cell, ATP is an essential component of the process. Active transport mechanisms are able to move these molecules over a concentration gradient because the hydrolysis of ATP supplies the energy needed. The source of energy in a cell is ATP. Cells are able to safely store energy in tiny packets and only release it when absolutely necessary. In other words, ATP bridges the gap between activities that need energy, like synthesis and those that release energy, like the breakdown of food.
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modern research indicates biology can influence behavior.
Lack of skills frequently leads to problem behaviors.According to recent study, biology can affect behavior.According to recent research, environmental factors can affect how genes develop.
That each of the above is a component of an evaluation of functional behavior?An FBA often involves data gathering and observation, looking at: The setting in which the behavior happens;The ABCs are the antecedents, the behavior, and the consequences of the behavior, as well as any additional factors that might be influencing the actions.
What are the behavior's two primary purposes?Social attention, access to material goods or favored activities, evasion of demands and activities, and sensory sensitivity are the four basic purposes of behavior
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intrinsic reflexes are inborn and serve to protect the body. reflexes are neural pathways composed of five basic components. reflex arcs Riding a bike and driving a car are examples of learned reflexes are rapid, predictable, and involuntary motor responses to stimuli.
Rapid, dependable, and uncontrollable motor reactions to stimuli are known as reflexes.
Neural pathways called reflex arcs are made up of five fundamental parts.
Learned reflexes include things like riding a bike and operating a vehicle.
The body has inherent reflexes that function as a defense mechanism.
What are intrinsic reflexes?
The quadriceps reflex is an example of an intrinsic reflex. In contrast, extrinsic reflexes have receptors and effectors that are located in separate organs (e.g., the oculovestibular reflex).
Reflexes are actions made up of comparatively basic behavioral segments that typically happen as quick, immediate reactions to certain stimuli that are specifically connected with them.
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Match each function with the correct cytoskeletal structure.
A. Motor Proteins
B. Microtubles
C. Intermediate filaments
D. Actin
The cytoskeleton of a cell is made up of microtubules, actin filaments, and intermediate filaments. These structures give the cell its shape and help organize the cell's parts. In addition, they provide a basis for movement and cell division.
What are their functions?Each function with the correct cytoskeletal structure are as follows:
A.)Motor proteins:-Uses ATP to move vesicles within cells. Use ATP to bend filaments.
B.)Microtubles:-Chromosome sorting during mitosis.
C.)Intermediate filaments:-A strong structural protein that maintains cellshape.
D.)Actin:- Structural protein used to move cells. Structural protein used in muscle contraction.
What is ATP?Adenosine triphosphate (ATP) is the source of energy for use and storage at the cellular level. The structure of ATP is a nucleoside triphosphate, consisting of a nitrogenous base (adenine), a ribose sugar, and three serially bonded phosphate groups.
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A student is studying the effect of testosterone in a specific signal transduction pathway. The student is using a special cell line that only contains testosterone receptors. Unfortunately, the student made an error when culturing the cells and all of the cells died! Thankfully a fellow classmate offered for the student to use their cell line. It is not the same cell line and does not contain the receptors that the student was studying. The student, however, points out that this is fine because there are other receptors that testosterone can bind to. Do you agree with this statement? Why or why not?
If the cell line does not contain the androgen receptors for testosterone this hormone (and related hormones neither) cannot bind to the target cell because the cell doesn't have receptors to bind for such hormone.
What is a hormone cell receptor?A hormone cell receptor is a structure in the cell that binds to hormone ligands depending on the specificity degree of this binding such as occurs in the case of androgen receptors and testosterone.
Therefore, with this data, we can see that hormone cell receptors are highly specific to bind hormone ligands.
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Which of the following is NOT a component of DNA?
a. The pyrimidine uracil
c. The purine adenine
b. Five-carbon sugars
d. Phosphate groups
Answer:
A
Explanation:
Phosphate was a limiting factor to algae growth in lake washington near seattle. In 1960s, eutrophication of the lake was largely addressed by limiting levels of?.
In 1960s, eutrophication of the lake was largely addressed by limiting levels of phosphorus.
The largest of the three significant lakes in King County, Lake Washington is also the second-largest natural lake in the state of Washington. In the 1960s, phosphorus concentrations were found to be 70 parts per billion. That was more than enough to support the large growth of algae that discoloured the water and washed up on the shore where it rotted and smelled.
Between 1941 and 1963, the lake received increasing amounts of secondary treated sewage, which led to eutrophication and a decline in the lake's water quality. Eutrophication, often known as the overgrowth of algae and big aquatic plants, is a process that can be brought on by an excess of phosphorus. High phosphorus levels can also cause algal blooms, which can create toxins that are dangerous to both human and animal health.
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TRUE/FALSE,meiosis is a mean to make gametes, and is the reason each parent passes one copy gene to their offspring
True.
The purpose of meiosis is to produce gametes or sex cells. During meiosis, four daughter cells are produced, each of which is haploid (containing half as many chromosomes as the parent cell).
What is Meiosis?
Meiosis contains two distinct cell divisions, which means that one parent cell can produce four gametes (eggs in females, sperm in males). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.
Before entering meiosis I, a cell must first go through interphase. This is the same interphase that occurs before mitosis. The cell grows, copies its chromosomes, and prepares for division during the G1 phase, S phase, and G2 phase of interphase.
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in correct order, from external to internal, the tissues of the testes include: cremaster muscle tunica vaginalis tunica albuginea septa
The correct order is dartos, tunica vaginalis, tunica albuginea, septa, scrotal cavity, cremaster
small pedunculated bodies may undergo torsion.
The testis lies outside the body cavity in the scrotum where it is maintained at a temperature 2–3°C lower than the body temperature. Failure to descend into the scrotum causes failure of spermatogenesis.
Blood supply
The testis and epididymis are suspended by the spermatic cord containing their arterial blood supply, venous and lymphatic drainage and nerve supply. The testis develops in the L2/L3 vertebral region and drags its vascular, lymphatic and nerve supply from this region to the scrotum.
Testicular and renal pain may mimic each other. Testicular pain hence can radiate to the loin and renal pain often is referred to the scrotum.
The arterial supply is via the testicular artery which is a branch of the abdominal aorta given off just below the level of origin of the renal arteries. The venous drainage is via the pampiniform plexus of veins which become a single testicular vein before terminating in the inferior vena cava on the right side and the left renal vein on the left side.
The lymphatics of the testis and epididymis accompany the blood vessels and drain into the para-aortic lymph nodes. Upper abdomen must therefore be palpated when searching for secondary lymphatic spread from a carcinoma of the testis.
The spermatic cord
The spermatic cord contains the ductus deferens (vas deferens), the testicular artery and the pampiniform plexus of veins. Other structures in the cord are the cremasteric artery, the artery to the vas, nerve to the cremaster, sympathetic nerves and the lymphatics of the testis and epididymis. Because of its passage through the inguinal canal the spermatic cord acquires three coverings, i.e. the external spermatic fascia from the external oblique aponeurosis at the superficial inguinal ring, the cremasteric muscle and fascia from the internal oblique, and the internal spermatic fascia from the transversalis fascia at the deep inguinal ring.
Varicocoele is a condition caused by dilated tortuous pampiniform plexus of veins. The condition, which may be felt as a ‘bag of worms’ while palpating the scrotum, is more commonly present on the left side. As the left testicular veins drain into the left renal veins it may be a sign of a malignant tumour in the left kidney.
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some protists are part of the select answer , a community of tiny drifting or swimming heterotrophic organisms in the sea. the select answer are a community of tiny drifting or swimming photosynthetic organisms in the sea.
No, protists are not part of this community of tiny drifting or swimming photosynthetic organisms in the sea.
What are Protists?
Protists are a diverse group of eukaryotic organisms that can be heterotrophic, autotrophic, or a mix of both. They can be unicellular, multicellular, or colonial. Protists can be found in many different habitats, including freshwater, marine, and terrestrial environments, and some are photosynthetic, while others are not.
What are Eukaryotic organisms?
Eukaryotes are organisms whose cells comprise a nucleus as well as other membrane-bound organelles. All animals, plants, fungi, and protists, as well as the majority of algae, are eukaryotic organisms. Eukaryotes can be single-celled or multicellular.
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