Answer:
Nucleus
Explanation:
Because an only prokaryotic cell has a true nucleus
Which of the following is a skin sensory receptor for touch?
A) Pacinian corpuscle
B) Meissner's corpuscle
C) Ruffini body
D) free nerve ending
Meissner's corpuscle is a skin sensory receptor for touch.
Meissner corpuscles are responsible for the sense of touch or light pressure, that is, they are very sensitive to the movement of objects on the skin and to very low vibrations.
About Meissner corpuscles:
• They are located on the lips and fingertips and are very sensitive.
• Meissner corpuscles act when there is a soft and light touch, and when vibrations are less than 50 hertz.
• These receptors can be altered when there is the presence of diseases where both thermal and tactile sensitivity are altered.
Therefore, we can conclude that Meissner corpuscles detect fine touch, that is, they are receptors on the skin that are sensitive to low-frequency vibration.
Learn more about Meissner corpuscles here: https://brainly.com/question/6963352
phân tích đặc điểm thích nghi sinh lý của sinh vật đất
Answer:
Các vi khuẩn Psychrotolerant rất quan trọng đối với các ứng dụng công nghệ sinh học và chu trình cacbon. Tuy nhiên, các cơ chế cho phép chúng tồn tại và hoạt động trong môi trường đông lạnh vẫn chưa rõ ràng. Để làm sáng tỏ sự thích nghi của màng tế bào vi sinh vật với sự đóng băng, chúng tôi ủ đất với glucose được đánh dấu 13C theo vị trí cụ thể ở + 5 (đối chứng), - 5 và - 20 ° C và định lượng 13C trong CO2 và axit béo phospholipid. Quá trình oxy hóa cao của glucose C-1 ở + 5 ° C cho thấy sự biến đổi thông qua con đường pentose phosphate. Tuy nhiên, ở nhiệt độ subzero, sự oxy hóa ưu tiên của vị trí C-4 gợi ý chuyển sang quá trình đường phân. Sự gia tăng gấp ba lần axit béo photpholipid Gram âm trong đất ủ ở - 5 ° C đi kèm với sự gia tăng gấp hai lần sự kết hợp ở 13C. Sự gia tăng không đều này của các axit béo phospholipid và kết hợp 13C có thể được giải thích là do sự khử bão hòa đồng thời của các chuỗi axit béo hiện có và sự tổng hợp de novo của các axit béo không bão hòa đơn, cho thấy sự phát triển của vi sinh vật. Ngược lại, vi khuẩn Gram dương kết hợp các axit béo phospholipid ở nhiệt độ - 20 ° C cao hơn 2 lần so với ở - 5 và + 5 ° C mà không làm tăng đáng kể hàm lượng axit béo của chúng. Điều này phản ánh việc sửa chữa chuyên sâu các màng bị hư hỏng ở - 20 ° C mà không có sự phát triển của vi sinh vật. Tỷ lệ nấm / vi khuẩn thấp hơn 1,5 lần ở nhiệt độ subzero so với + 5 ° C, phản ánh sự thay đổi cấu trúc cộng đồng vi sinh vật theo hướng vi khuẩn. Theo đó, vi sinh vật đất thích nghi với sự đóng băng bằng cách (1) chuyển con đường trao đổi chất của chúng từ con đường pentose phosphate sang đường phân, (2) điều chỉnh axit béo phospholipid bằng cách khử bão hòa và, (3) chuyển cấu trúc cộng đồng vi sinh vật sang vi khuẩn Gram âm bằng cách khử nấm dân số.
Explanation:
Không phải lời của tôi! Tôi hi vọng cái này giúp được!
The photograph shows soil layers. What is the bottom layer of soil?
Answer:
bed rock
Explanation:
ok ok ok ok ok ok ok ok ok ok ok
Does religion or evolution explain why we are here. which is right are they both right are both wrong. explain your reasoning
ᴵ ˡᶦᵏᵉ ᵗᵒ ˢᵉᵉ ʷʰᵃᵗ ᵒᵗʰᵉʳ ᵖᵉᵒᵖˡᵉ ˢᵃʸ ᵃᵇᵒᵘᵗ ᵗʰᶦˢ.
I will give brainly if your argument is convencing
Answer:
ok so like i think they do but it also makes things really complicated
Explanation:
becauuuuseeeee its the fact that for me i always think that maybe thats how the world birthed orrrrrrrr that all of this is a made up concept of life cause everything you think about is just another concept. anddddd it could just be like the matrix and its like hard to think about how everything we know couldd just be made up or pointless to the point where there is a point of living ykkkkk.
All living things must take in and use energy to perform the functions associated with life which of the following functions are required for organisms to maintain a constant internal environment select all that apply.
Transforming energy
moving substances into an out of cells
photosynthesis
synthesizing complex molecules
Answer: synthesizing of complex molecules
Explanation:
During the synthesizing of complex substances (catabolism) energy is given off to the body to generate heat within the body
Yeasts life cycle is categorized as
Answer:
Alteration in generation
Explanation:
It's because yeast has both haploid and dipliod phases in its life cycle ♂️
Which best describes adenosine triphosphate (ATP)?
A waste product molecule that is produced by cells but cannot be used by them.
A high energy molecule that is used by every cell in the body as an energy carrier.
A process that is used to create energy when oxygen is available to the body.
A process that is used to create energy when oxygen is not available to the body.
Answer:
a high-energy molecule that is used by every cell in the body as an energy carrier.
Answer:
A high energy molecule that is used by every cell in the body as an energy carrier.
Explanation:
Adenosine triphosphate, also known as the "energy currency" of the cell is an organic molecule that readily supplies energy to the cells to carry out metabolic and catabolic functions. This molecule consists of a nitrogenous base known as adenine, ribose sugar, and three phosphate molecules. The hydrolysis of ATP provides energy for muscle contraction, nerve impulses, signaling for hereditary materials like DNA and RNA, as well as phosphorylation.
Earth's seasons are caused by its
O A. precession
O B. rotation
O C. revolution
O D. ecliptic
Answer:
seasons are caused by revolutions. hope this helps
it is responsible for being bidirectional of the cell membrane
Answer:
I believe it is Cholestral
Explanation:
A sample of 100 students shows that 16 have smooth chins (recessive allele to cleft chin). Calculate the number o heterozygous students.
What gland produces an iodine-containing jormone
Thyroid Gland produces an iodine-containing hormone
Answer:
thyroid gland
Explanation:
internally, the glands consists of follicles, which produce thyroxine and triiodothyronine hormone. These hormones contain iodine.
Use the drop-down menu to complete the
sentence.
are capable of differentiation to
form specialized cells.
DONE
Answer:
The correct answer is - stem cells.
Explanation:
Stem cells can give rise to all tissues and organs in the body. These cells can differentiate into any form of cells, which allows them to repair tissues that have been damaged by various physiological or natural ways
There are two types of stem cells: Adult Stem Cells and Embryonic stem cells.
Cells that are present in the bone marrow or umbilical cord of a newborn baby and can be divided as Hematopoietic, a cell that can form blood cells and the immune system, and mesenchymal that form the body's cartilage, bones, muscles and other.
Embryonic stem cells are found on at blastocyst stage of embryo. These cells can transform into any type of tissue in the human body, which increases their treatment potential.
Answer:
stem cells
Explanation:
Because I'm smart...
Where are the photoreceptors located Inside a human eye?
Answer:
○They are located in the retina.
The type of cell in your eye that
detects photons and sends them to
your brain.
They are found in the retina (the back layer of the eye). Rods and cones are
the two types.
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☆HOPE IT HELPS....
☆HAVE A GREAT DAY!!!
What processes found at a divergent boundary will help form the following rocks?
Answer:
B
Explanation:
What is a divergent boundary:
In plate tectonics, a divergent boundary is a linear feature that exists between 2 tectonic plates moving away from each other.
They can produce rifts, which become rift valleys.
Divergent boundaries also form volcanic islands, which occur when the plates move apart to produce gaps that magma rises to fill.
Sedimentary rocks form due to deposition, and accumulation
Metamorphic rocks form in a transformation of existing rock to new rock in a process called metamorphism.
Igneous rocks form through the cooling and solidification of magma or lava.
When the filled gaps of magma cool off, it will produce igneous rocks.
Where Adam and Eve really the first people? or where there other people before them, or did adam and eve even exist at all. explain your reasoning.
ᴵ ˡᶦᵏᵉ ᵗᵒ ˢᵉᵉ ʷʰᵃᵗ ᵒᵗʰᵉʳ ᵖᵉᵒᵖˡᵉ ˢᵃʸ ᵃᵇᵒᵘᵗ ᵗʰᶦˢ.
i will give brainly if it is convencing.
Answer:
If you are religious then you might believe in Adam and Eve and the Garden of Eden. But if you believe in science, then you would believe in evolution.
Sapiens or humans have been on the Earth for around 300,000 years.
Earlier ancestors existed 1.4 to 2 millions years ago.
Earliest writing is 5400 years old.
The bible is 2700 years old.
Why was there no record of Adam and Eve earlier?
Because they never really existed until someone created them.
The someone wasn't a deity . It was a man. A man who created a story.
What is the answer for this
Answer:
Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
....... bacteria as in absence of air
what is photosynthesis .......?
Answer:
the process by which green plants turn carbon dioxide and water into food using energy from sunlight
Answer:
Explanation:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
what energy source does the nervous system prefer
Answer:
NIH
Explanation:
It's a primary energy required
What are the components of the extracellular matrix of bone? Blood? Describe how these different matrices contribute to the different functions of bone and blood?
Answer:
The Bone Extracellular Matrix in Bone Formation and Regeneration
Explanation:
Bone regeneration repairs bone tissue lost due to trauma, fractures, and tumors, or absent due to congenital disorders. The extracellular matrix (ECM) is an intricate dynamic bio-environment with precisely regulated mechanical and biochemical properties. In bone, ECMs are involved in regulating cell adhesion, proliferation, and responses to growth factors, differentiation, and ultimately, the functional characteristics of the mature bone. Bone ECM can induce the production of new bone by osteoblast-lineage cells, such as MSCs, osteoblasts, and osteocytes and the absorption of bone by osteoclasts. With the rapid development of bone regenerative medicine, the osteoinductive, osteoconductive, and osteogenic potential of ECM-based scaffolds has attracted increasing attention.
please mark as brainliest
Consider a mixture of bacterial species from the same genus, such as Staphylococcus. Some members of this genus are harmful pathogens, while others are not. Would a selective medium alone be a good tool to separate the harmful species from the non-harmful species
Answer:
No. There are different types of media that may result useful to separate this species. Moreover, differential media can also be used to differentiate closely related species (e.g., by the change of color in the medium)
Explanation:
A selective media is a type of media capable of selecting for the growth of specific microorganisms while inhibiting the growth of others. For example, if a bacterium is resistant to an antibiotic (e.g., ampicillin), then this compound can be added to the medium in order to select bacteria that are resistant and simultaneously inhibit the growth of susceptible bacteria. Moreover, a differential media is a media that contain chemical indicators that allow certain microorganisms to be visually identified by the appearance of the colony and/or its surrounding media. Differential media have into account certain biochemical characteristics of target microorganisms (e.g., the change of color in the medium which is associated with the ability of the microorganism to ferment sugar molecules).
Melanie has had a recent cold with symptoms of runny nose, sneezing, coughing, congestion, and malaise. Today, she is concerned that she has a sharp pain in her chest. She goes to see her health care provider, and is diagnosed with costochondritis, an inflammation in the cartilage between the ribs. From your reading related to cellular injury and adaptations as well as inflammation, answer the following questions:
a. What anatomic problem most likely leads to costochondritis?
b. What is the injury in costochondritis?
c. What would the acute inflammatory response look like?
Answer:
a. Viral infections may lead to inflammation between the ribs (i.e., costochondritis)
b. Viral infection
c. Viral infection may lead to the influx of chemical mediators (cytokines), increased blood flow, and movement of plasma and white blood cells (leukocytes) from the blood into the injured site
Explanation:
Costochondritis is a painful condition caused by the inflammation of the cartilage that joins the ribs to the breastbone (this joint is known as the “costochondral joint”). Costochondritis is caused by inflammation of the costochondral joint, which may be triggered by multiple causes including, among others, viral/bacterial/fungal infections, exercise or strenuous activity, chest trauma, osteoarthritis, presence of tumors, etc. Acute inflammation is the immediate immune response of the body to harmful stimuli (e.g., viral infections), which is characterized by the increased movement of white blood cells (such as neutrophils and macrophages) that rapidly travel from the blood into the injured area. This plasma contains chemical mediators like pro-inflammatory cytokines which are secreted from immune cells (e.g., Th1 cells, CD4+ cells, macrophages) in order to promote inflammation.
what are plastids?name their types.
Answer:
A double membrane bound organelle involved in the synthesis and storage of food, and is commonly found within the cells of photosynthetic organisms, like plants. Supplement. One of the distinctive features of a plant cell is the presence of plastids.Types of Plastids
Chloroplasts.
Chromoplasts.
Gerontoplasts.
Leucoplasts.
Which type of process occurs in the absence of oxygen?
cellular respiration
photosynthesis
fermintation
all of the above
photosynthesis prosecss in the absence of oxygen
Write Ratio 10 :35 in the form 1:n
1:3.5
Hope this helps! :)
Anyone know the answer?
Answer:
the answer c. is correct
Explanation:
During DNA replication, the two parental DNA strands must be separated so that both strands can be copied. The resulting structure known as 'replication fork' is generated by helicase enzymes that break hydrogen bonds that hold DNA strands together, thereby the two strands of the DNA double helix uncoil at a specific location called the origin. DNA replication always proceeds in 5' to 3' direction. In consequence, a new DNA strand referred to as 'leading strand' is continuously synthesized because this strand grows in the same direction (5' to 3' direction) of the replication fork's movement, while other new DNA strand referred to as 'lagging strand' is synthesized discontinuously in short pieces called Okazaki fragments.
Which gases is unique to planet earth?
Answer:
Earth's atmosphere is roughly 78 percent nitrogen and 21 percent oxygen, with trace amounts of water, argon, carbon dioxide and other gases. Nowhere else in the solar system is there an atmosphere loaded with free oxygen, which is vital to one of the other unique features of Earth: life.
Answer:
oxygen and carbon dioxide are unique gases to planet earth..
If you chemically synthesized the DNA molecule ATGCCGAATG from individual nucleotides, what would be present in solution besides the DNA?
A. phosphate
B. RNA
C. lipids
D. glucose
Answer:
C
Explanation:
Answer:
c. lipids
Explanation:
Explain the lac operon. How does it work when lactose is present and when lactose is not present. What about the presence of glucose?
Answer: The lac operon is an operon used to transport and metabolize lactose. In the presence of lactose, it functions as an inducer, it binds to the Lac I repressor protein and generate a conformational change that decreases its affinity for the operon region. Thus, the operon region is left free, the RNA polymerase can transcribe the structural genes.
Explanation:
An Operon is a group of structural genes whose expression is regulated by the same control elements and genes. The lac operon is an operon used to transport and metabolize lactose in Escherichia coli bacteria. Lactose is a disaccharide formed by the union of a glucose molecule and a galactose molecule (monomers). Upon breaking the glycosidic bond of lactose, both monomers are released and become available for use for energy. Remember that glucose is the main source of energy, and bacteria will always prefer to metabolize glucose rather than any other sugar, which they will only metabolize as an alternative energy source if glucose is not available.
The operon consists of several structural genes:
Lac z gene: encodes the enzyme β-galactosidase, which catalyzes the hydrolysis of lactose into glucose and galactose.Gene lac y: encodes the protein galactoside permease, for the transport of lactose into the bacterium.Promoter: region of DNA upstream of the above-mentioned genes that controls their expression, and where RNA polymerase binds to carry out gene transcription (synthesis of RNA from DNA that involves the expression of a gene).Operator: region of DNA located between the promoter and the beginning of the structural genes, which is recognized by the repressor protein Lac I.Repressor gene: encodes the Lac I repressor protein, which binds to the operator region and thus prevents transcription of genes under the control of this promoter. When the repressor is removed from the operator (in the presence of inducer which is lactose), RNA polymerase is ready to bind and start transcription.So, the lac operon is under a type of negative regulation, where genes can always be transcribed, except when the Lac I repressor protein is bound to the operator region. The promoter of the lac I gene is constitutive, so the Lac I protein is permanently expressed and remains bound to the operator, preventing the transcription of structural genes. That is, preventing the action of the lac operon in the absence of lactose. However, in the presence of lactose, it functions as an inducer of the operon. It is able to bind to the Lac I repressor protein and generate a conformational change that decreases its affinity for the operon region. Thus, the operon region is left free, the RNA polymerase can freely transcribe the structural genes, the enzyme β-galactosidase is synthesized which can degrade lactose to glucose plus galactose (and thus metabolize the lactose in the medium).
It should be clarified that in reality, the true inducing molecule of the lac operon is allolactose, an isomer of lactose obtained by a transglycosylation occasionally carried out by β-galactosidase. But usually to simplify terms, lactose is referred to as the inducer.
So, the lac operon is always inactive unless there is lactose in the medium. As mentioned, E. coli prefers glucose, so the lac operon will not be activated in the presence of lactose if glucose is present in the medium. If both glucose and lactose are present in the medium, the repressor is inactivated, so the operon is transcribed but at a basal (low) level due to the presence of glucose.
What is directly responsible for matter moving and changing in an animal's
body?
A. Water
B. Sun
C. Energy
D. Fuel