Pleasssee helepppppp
Explain the importance of nitrogen-fixing bacteria?
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Nitrogen-fixing bacteria fix atmospheric nitrogen to ammonia, which can then be taken up by plants.
The process is called biological nitrogen fixation. Rhizobium, Azotobacter, cyanobacteria are some examples of nitrogen-fixing bacteria, which may be free-living or symbiotic.g Cerebrospinal fluid formed in the lateral ventricles travels through the ________ to reach the third ventricle.
Answer: Interventricular foramen
Explanation:
The cerebrospinal fluid is a fluid that covers the brain and spinal cord. It circulates through the subarachnoid space, the cerebral ventricles and the ependymal canal. Several diseases alter its composition and its study usually detects meningeal infections, carcinomatosis and hemorrhages. Some of its functions are:
Hydropneumatic support against local pressure for the encephalon.Eliminates metabolites from the central nervous system.Protects the central nervous system from trauma.This fluid also fills the ventricles, which are large open structures deep within the brain and help keep the brain buoyant and cushioned. The lateral ventricles are the largest ventricles and connect to the third ventricle through the intraventricular foramen. This third ventricle is a narrow, medial cavity located between the diencephalic masses. Then, the interventricular foramina are channels that connect with the ventricles of the lateral walls and with the third ventricle, at the level of the midline of the brain. Like these channels, they allow cerebrospinal fluid to circulate through the rest of the ventricular system of the brain. The walls of the foramina also contain choroid plexuses, responsible for the production of cerebrospinal fluid, which continue in both the lateral ventricles and the third ventricle. After reaching the third ventricle, the cerebrospinal fluid travels through the median aperture into the subarachnoid space at the base of the brain.
When the brain detects high levels of carbon dioxide and low levels of oxygen, the following will occur: A. the nerves innervating the heart will release acetylcholine to slow heart rate. B. the nerves innervating the heart will release acetylcholine to increase heart rate. C. the nerves innervating the heart will release norepinephrine to slow heart rate. D. the nerves innervating the heart will release norepinephrine to increase heart rate.
Answer:
Norepinephrine is released by sympathetic nerves and this causes increase in heart rate.
So option d is correct. :)
Explanation:
Answer:
D.
Explanation:
I have answered this exact question before
What is the role of an indicator? Predict how the glucose test strips and iodine would react with the following foods:
Grape
Tomato
Summer squash
Orange
Bell pepper
Answer:
Tomato
Explanation:
The density of protists living in the hay infusion is ______________ than the regular pond water.
a. significantly lesser
b. lesser
c. about the same
d. greater
e. significantly greater
Answer:
a. significantly lesser
Explanation:
The density of protists living in the hay infusion is significantly lesser than the regular pond water because protists likes to live in aquatic or any water bodies. Some protists float on the surface of the water making their own food like plants by using the process of photosynthesis. Aquatic environments are ideal environment for protists, which have cilia and flagella that allows them to move in the water in search of food..
walking, running and carrying a book involve using ________ type of muscles.
a) cardiac
b)voluntary
c)involuntary
d)Striated
Answer:
It is voluntary I believe.
Explanation:
Which is likely to be the first organisms to colonize an area after an disturbance like fire?
Lichens
Woody plants
Grasses
Shrubs
Answer:
Grasses
Explanation:
This question is describing secondary succession, which is the type of succession that occurs when a given area has being disturbed by natural disasters like hurricane, volcanic eruption, fire outbreak etc.
In secondary succession, the first set of organisms that recolonize the area after the disturbance are called PIONEER SPECIES. Pioneer species can include small annual plants like grasses. Hence, among the given options, GRASSES are likely to be the first organisms to colonize an area after a disturbance.
Match the organelle (1-4) with the correct description (5-8). 1) mitochondrion 5) synthesizing molecules 2) centriole 6) liquid in cell 3) endoplasmic reticulum 7) provides cell with energy 4) cytosol 8) aids the formation of the spindle apparatusA) 1 and 5, 2 and 6, 3 and 7, 4 and 8 B) 1 and 7, 2 and 6, 3 and 8, 4 and 5 C) 1 and 7, 2 and 8, 3 and 5, 4 and 6 D) 1 and 8,2 and 5, 3 and 6, 4 and7 E) 1 and 6, 2 and 8, 3 and 5, 4 and7
Answer:
C) 1 and 7, 2 and 8, 3 and 5, 4 and 6
Explanation:
1 and 7: 1) mitochondrion; 7) provides the cell with energyThe mitochondrion is the organelle that produces the energy that the cell needs for its functions. It synthesizes adenosine triphosphate (ATP), which storages large quantities of energy in its bonds.
2 and 8: 2) centriole; 8) aids the formation of the spindle apparatusThe centrioles have a crucial role during mitosis. They form the spindle apparatus that attaches to the chromosomes, moving them to the opposite poles of the cell.
3 and 5: 3) endoplasmic reticulum; 5) synthesizing moleculesThe endoplasmatic reticulum is a continuous membrane connected to the nuclear membrane. There are two types, the Rough Endoplasmatic Reticulum (RER) and the Smooth Endoplasmatic Reticulum (SER). The first one synthesizes proteins, while the second one synthesizes lipids.
4 and 6: 4) cytosol; 6) liquid in the cellThe cytosol is the liquid that is inside the cell. It is mostly water, but it also has ions and molecules. It is important for the transport of substances.
The correct match between organelles and their description is - Option C. 1 and 7, 2 and 8, 3 and 5, 4 and 6.
In the cell, there are many organelles that perform different and specific functions essential for the cell to survive. These organelles help in synthesizing molecules, energy production, cell division, and many others.
Mitochondrion: it is a cell organelle that is the site of cellular respiration, which is a process that breaks the sugar molecule and releases a high amount of energy in the form of ATP. Therefore, it is known as the powerhouse of the cell. Thus, correctly matches with 7) provides the cell with energyCentriole: It is organelles that help to form the spindle during the cell division in the cell that makes the region at the poles where spindle fibers form. Thus, it correctly matches with 8) aids the formation of the spindle apparatus.Endoplasmic reticulum: It is organelles that synthesize various molecules such as hormones and other protein molecules, Rough ER has ribosomes attached to it that synthesize proteins. Thus, correctly matches with 5) synthesizing moleculesCytosol: It is a semi-fluid-like substance made up of a lot of water, dissolved ions, smaller minute molecules, and proteins. It has filled in the interior cellular space. Thus, the correctly matches with 6) liquid in the cell.Thus, the correct answer is - Option C.
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9.5 What are the similarities and differences between reproduction in amoeba and reproduction in hydra?
Answer:
similarities: 1 they both reproduce asexually
Differences: 1 hydra reproduce through a process called budding whereas amoeba reproduce through a process called binary fission.
2 budding in hydra- results in symetric division.
binary fission in amoeba- results in unsymetrical division.
Explanation:
All of the following refer to mitosis, except repair of damaged cells. production of genetically identical daughter cells. formation of gametes. growth of an organism. asexual reproduction.
Answer:
formation of gametes.
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Generally, cells have the ability to independently replicate themselves.
Differentiation can be defined as the process in which a cell changes from a generalized cell type into a specialized cell type for performing specific functions in the body.
Mitosis can be defined as a type of cell division that occurs in all body cells found in living organisms.
Hence, all of the aforementioned statements refer to mitosis, except formation of gametes.
In living organisms, the formation of gametes is linked or has to do with meiosis.
If segmentation has been done correctly, then the segments should reflect homogeneity within each segment and across/ between segments. This statement is ______________
Answer:
The correct answer is - true.
Explanation:
The given statement is true as common marketable traits are observed between the segments it would represent homogeneity. This same segment would be representing homogeneity within each segment and between segments that would be heterogeneity in order to propagate the market.
If segmentation has been done correctly, then the segments should reflect homogeneity within each segment and across/ between segments. This statement is TRUE.
In biology, segmentation refers to the embryonal process where different parts of the body are formed during development.Segmentation can be defined as the repetition of two or more body units along the anterior-posterior axis.Segmentation is a fundamental process in insect and mammal development.In conclusion, if segmentation has been done correctly, then the segments should reflect homogeneity within each segment and across/ between segments. This statement is TRUE.
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A dihybrid cross is performed between a corn plant with the genotype YYSS and a corn plant with the genotype yyss. What percentage of offspring will be yyss
Answer:
0%
Explanation:
All corn plants will have the genotype YySs
The percentage of offspring that will be yyss is 0%.
In a dihybrid cross, the alleles for two different traits are considered. In this case, the traits are color (purple or yellow) and texture (smooth or wrinkled). The genotype of one parent is YYSS (homozygous dominant for both traits), and the genotype of the other parent is yyss (homozygous recessive for both traits).
According to the principles of Mendelian inheritance, when crossing two parents with different genotypes, the offspring will inherit one allele from each parent for each trait. In this case, the offspring will receive either a Y or y allele for color and an S or s allele for texture.
Since the parent with the genotype YYSS is homozygous dominant for both traits, all of its gametes will carry the Y and S alleles. On the other hand, the parent with the genotype yyss is homozygous recessive for both traits, so all of its gametes will carry the y and s alleles.
When these gametes combine during fertilization, all the resulting offspring will receive a Y allele for color and an S allele for texture, as there are no alternative alleles present in the parents. Therefore, none of the offspring will have the yyss genotype.
In summary, the dihybrid cross between the plants with genotypes YYSS and yyss will produce offspring with the genotype YySs, but none of the offspring will have the yyss genotype. Therefore, the percentage of offspring that will be yyss is 0%.
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The complete question is:
A type of corn has kernels that are either purple or yellow, and smooth or wrinkled. Yellow-Y- is dominant over purple-y- and smooth-S-is dominant over wrinkled --- A dihybrid cross is performed between a corn plant with the genotype YYSS and a corn plant with the genotype yyss. What percentage of offspring will be yyss? Select one or more:
a. 100% b. 80%c. 50% d. 25% e. 10%f. 0%What is socialization
Which is not a kingdom in the Eukarya domain?
O A. Animalia
O B. Bacteria
O C. Plantae
O D. Protista
Answer: b bacteria
Explanation:
Answer:
Protista
Explanation:
Protists are uni-cellular and don’t consist of a nucleus which makes them prokaryotic, not eukaryotic.
( PLEASE ANSWER IT FAST) Label the Organelles of a Cell
Identify the organelles in the cell to the right.
i think i'm too late to help D:
Answer:
A-vacuole
b- chloroplast
c-cell membrane
d- golgi
e- endoplasmic
f-cell wall
Explanation:
A mother is a carrier for colorblindness and a dad is colorblind, please draw a Punnet square and indicate the probability of having a child who has colorblindness, a child who is not colorblind and a child who is a carrier for colorblindness.
Answer:
Table is given below.
Explanation:
Puneet square is a square diagram that is used to show and predict the genotypes of a species through the cross beading experiment. It was developed in 1905. It is a tabular summary of all the all the possible combination of maternal and paternal allies.Which is not true regarding the mammalian cardiac cycle
Group of answer choices
both atria contract at roughly the same time, and then the ventricles
relaxation, or filling, phase is called diastole
the semilunar valve is the usual pacemaker
contraction, or pumping, phase is called systole
What process in biology requires energy from a cell?
Answer:
I would assume you are talking about just basic general biology, in which case it's probably just looking for cellular respiration.
Explanation:
Which of the following is not a characteristic of pioneer species ?
They facilitate environmental change, making an environment more habitable for other species
They remain in an environment,even as more competitive species arrive
They tolerate a wide range of conditions
They are capable of colonizing a barren environment
Answer:
They remain in an environment,even as more competitive species arrive
Explanation:
Pioneer species, in ecological succession, are the first set of organisms to colonize a bare area of land or a disturbed area of land. Pioneer species include lichens, grasses, fungi etc.
Pioneer species have unique characteristics that distinguishes them from every other species of organism. These include:
- They facilitate environmental change, making an environment more habitable for other species.
- They tolerate a wide range of environmental conditions.
- They are capable of colonizing a barren environment, as in primary succession.
However, pioneer species do not remain in an environment, even as more competitive species arrive. They rather give way for new species to emerge and dominate.
If two haploid sperm fertilize a single haploid ovum, the resulting zygote would be considered a ________.
3. When there are issues with the neural tissue like this, they will often look into the eye. Why?
When there are problems with neural tissue like this, they often look into the eyes, because unlike other nerve cells in the brain, which are covered in protective myelin, nerve fibers in the retina do not have this layer and are therefore more susceptible to damage.
What is the function of neurons?Neurons are cells responsible for transmitting nerve impulses. Neurons are excitable cells, that is, they can respond to stimuli with changes in the electrical potential difference across the cell membrane.
With this information, we can conclude that the cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells.
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A number of similar families make up a(n) _____.
If the complex cholesterol- HRP would not be commercially available, use the knowledge you learnt and internet to determine an alternative way for detecting cholesterol.
Answer:
Classical chemical methods, enzymatic assays, gas chromatography (GC), liquid chromatography (LC), and mass spectrometry (MS)
Explanation:
Classical chemical methods, enzymatic assays, gas chromatography (GC), liquid chromatography (LC), and mass spectrometry (MS) are the alternate methods used for the detection of cholesterol. These methods are used when HRP would not be commercially available for the analysis or detection of cholesterol in the patient's body so these methods can be used for the purpose of detection of cholesterol.
Besides oxygen exchange, the respiratory system also functions to eliminate (Click to select) . Too much of this gas can cause a(n) (Click to select) in blood pH, compromising homeostasis.
Answer: Carbon dioxide, decrease
Explanation:
Cellular respiration is a set of reactions by which organic compounds (sugars) are degraded by oxidation to inorganic substances. This process provides energy in the form of ATP and to achieve this, many reactions occur in which electrons are passed from one molecule to another, called redox reactions. In the case of aerobic respiration, the final electron acceptor is molecular oxygen, which is reduced to water. Oxygen, like any gas, crosses the plasma membrane and then the mitochondrial membrane, and in the mitochondrial matrix it binds electrons and protons, forming water. It is in this final oxidation and in previous processes that energy is obtained. The reactions that extract energy from sugars such as glucose are catabolic reactions since a large molecule is broken into smaller molecules. For example, when glucose is broken down in the presence of oxygen, six molecules of carbon dioxide (CO2) and six molecules of water are obtained. Both CO2 and water are eliminated by lung exhalation.
In the event that this carbon dioxide is not completely eliminated, something called respiratory acidosis occurs, which is one of the disorders of the acid-base balance due to a decrease in the frequency of respirations or hypoventilation. The increase in the concentration of carbon dioxide in the blood causes the pH value to decrease. This scale is a measure of the degree of acidity or alkalinity of a substance or solution. A pH value of less than 7 means it is more acidic, and a pH value of more than 7 means it is more alkaline. Carbon dioxide is constantly produced as the body metabolizes energy, which will accumulate in the circulation rapidly if the lungs do not remove it properly. Alveolar hypoventilation thus leads to an increase in arterial CO2 partial pressure. The increase in pressure in turn decreases the ratio of bicarbonate (HCO3) to bicarbonate pressure with a consequent increase in acidity or decrease in blood pH. The body's metabolism rapidly generates a large amount of carbonic acid (H2CO3) and non-volatile acid. The lungs normally excrete the volatile fraction through ventilation without accumulation of acid in the blood but in this case this is not possible and this accumulation of carbonic acid causes the pH to rise. This disrupts homeostasis, a form of equilibrium that is achieved through a network of feedback control systems that constitute the self-regulatory mechanisms.
The switch from mitosis to meiosis in spermatogenesis is regulated by _____ levels of _______ and this is induced by _________. Fill in the blanks. Group of answer choices low, glial cell derived neurotrophic factor (GDNF), luteinizing hormone (LH) high, glial cell derived neurotrophic factor (GDNF), luteinizing hormone (LH) low, testosterone, follicle stimulating hormone (FSH) low, glial cell derived neurotrophic factor (GDNF), follicle stimulating hormone (FSH)
Answer:
1 - Follicle stimulating hormone FSH
2 - Luteinizing hormone LH
3 - Glial cell derived neurotrophic factor
Explanation:
Follicle stimulating hormone is a pituitary gland located underneath brain. It plays an important role in sexual development. FSH level in women stimulates egg production in ovaries and regulates menstrual cycle. In men FSH helps to control sperm production.
The switch from mitosis to meiosis in spermatogenesis is regulated by _____ levels of _______ and this is induced by _________.
Follicle-stimulating hormone Luteinizing hormoneGlial cell-derived neurotrophic factorWhat are the roles of mitosis and meiosis in sperm development?Somatic cells experience mitosis to increase, the germ cells experience meiosis to produce haploid gametes (the sperm and the egg).
The evolution of a new offspring organism is then started by the fusion of these gametes at fertilization.
Thus, Follicle-stimulating hormone, Luteinizing hormone, Glial cell-derived neurotrophic factor.
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When the belt is moving at a high speed, 350 pills can be coated per hour. How many minutes would it take to coat all the pills in this batch at a high speed?
Answer:
6 pills are coated in one minute time.
Explanation:
There are 350 pills can be coated in 60 minutes due to high speed of belt movement which means that 6 pills are coated in one minute time period so if there are 60 pills so the belt takes 10 minutes to complete the coating of the pills. If there are 200 pills to be coated then we used the equation i.e.
6 pills -------- 1 minute
200 -------- x
By cross multiplication we get,
6x = 200 x 1
x = 200 / 6
x = 33.3 minutes
This means that in 33 minutes the belt can coated 200 pills.
Dalits are followed enters in temples true or false
Answer:
False A notice by the priest told dalits they can’t enter the temple because they are “not pure”
What are the 4 main parts to an amino acid
Answer:
» A central alpha - hydrocarbon.
» A carboxyl functional group.
» And amine functional group.
» A side chain.
A patient is examined for a routine volleyball physical, and she has a heart murmur. This may result from:
Group of answer choices
patent foramen ovale
hypotension
tetrology of Fallot
Backflow of blood through a defective valve
Answer: The answer is the last option, Backflow of blood through a defective valve.
Explanation: Hypotension causes high blood pressure, and the other two options are not related to heart murmurs. A hear murmur is when the blood isn't flowing in the right direction causing the hear to beat irregularaly.
