Answer:
The inner wall of the small intestine is covered by numerous folds of mucous membrane called plicae circulares. The surface of these folds contains tiny projections called villi and microvilli, which further increase the total area for absorption.
I hope this will help you if not then sorry, have a wonderful day :)When does crossing over occur in meiosis
Answer:
Crossing over occurs during prophase I of meiosis before tetrads are aligned along with the metaphase I.
Which tissue is found in papaya stem?
Answer:
spongy fibrous tissue
Explanation:
l hope it helps have a great day
Answer:
Xylem tissue
Explanation:
the stem of papaya is straight ,unbranched and soft.
What is a possible result of evaluating your investigation
The evolutionary history and development of whales has been hotly debated. Recently there has been a major shift in our understanding of the processes used to detail whale evolution. This indicates that: Group of answer choices A) Aspects of evolution are constantly being challenged and explored in light of new evidence. B) Gaps in the fossil records will never allow us to fully understand evolution. C) Scientists studying evolution typically present ideas with very little evidence, leaving it to others to find proof of their ideas. D) Much of the science of evolution is based on speculation that can easily be changed when scientists think of new ideas.
Answer:
Aspects of evolution are constantly being challenged and explored in light of new evidence
Explanation:
The whole idea of evolution has to do with the fact that organisms developed into their present form from simpler life forms. According to Oxford dictionary, evolution is; ''the process by which different kinds of living organism are believed to have developed from earlier forms during the history of the earth.''
Evolution depends on evidence from fossil records. Evidences that support the theory of evolution continue to be amassed as science advances. Hence, aspects of evolution are constantly being challenged and explored in light of new evidence.
For this reason, the evolutionary history and development of whales is being hotly debated and there has recently been a major shift in our understanding of the processes used to detail whale evolution.
Kepler discovered that
have elliptical orbits.
moons
comets
planets
all of the above
Help please??
Answer:
all of the above
Explanation:
gravity makes a planet have a combination go straight yet go around the sun at the same time creating an ellipse
sciencefocus
Questions 1 and 2 refer to the following statements:
I. Shortening of the chromosomes
II. Synthesis of DNA
III. Crossing over of non-sister chromatids
IV. Separation of sister chromatids
1. Which events occur during mitosis?
A) I and II only
B) I and III only
C) I and IV only
D) I, II, and IV only
2. Which events occur during meiosis I?
A) I and II only
B) I and III only
C) I and IV only
D) I, III, and IV only
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. Most eukaryotic chromosomes include packaging proteins called histones which, aided by chaperone proteins, bind to and condense the DNA molecule to maintain its integrity. These chromosomes display a complex three-dimensional structure, which plays a significant role in transcriptional regulation.
Chromosomes are normally visible under a light microscope only during the metaphase of cell division (where all chromosomes are aligned in the center of the cell in their condensed form). Before this happens, each chromosome is duplicated (S phase), and both copies are joined by a centromere, resulting either in an X-shaped structure (pictured above), if the centromere is located equatorially, or a two-arm structure, if the centromere is located distally. The joined copies are now called sister chromatids. During metaphase, the X-shaped structure is called a metaphase chromosome, which is highly condensed and thus easiest to distinguish and study. In animal cells, chromosomes reach their highest compaction level in anaphase during chromosome segregation.
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In a survivorship curve, a type III species, like most insects and plants, is a species that has Group of answer choices an extremely long life span. a strong possibility of becoming extinct in a relatively short period of time. an equal probability of dying at any age. the highest probability of dying as it reaches its maximum life span. the highest probability of dying at a very young age.
Answer:
The correct answer is - the highest probability of dying at a very young age.
Explanation:
A type III survivorship curve represents species such as insects and plants where the individuals will live their life span to adulthood and die as they get older due to the greatest mortality for such individuals of certain species is experienced early in life. There will be a concave curve on a graph in type 3 species curve of survivorship. Therefore, there is very high chances of such species to die at very young age.
The graph shows the supply and consumption of forests when the
consumption rate and population growth rate are both low.
When does consumption begin to surpass supply?
Answer:
In about 625years
Explanation:
According to the graphical representation depicted in this question, it shows the supply and consumption of forests when the consumption rate and population growth rate are both low. The green line represents the total consumption while the red line represents the total supply.
Based on observation of the graph, the total consumption exceeds or surpasses the total supply at a little above 600 years. Approximately, this can be said to be in about 625years.
Answer:
In about 625 years
Explanation:
Consumption has definitely surpassed supply by 700 years, but it only begins to surpass it around the 625 year mark according to the graph
The energy to turn raw materials into food is powered by ________ and occurs in the plant’s ________.
A. water, mitochondria
B. glucose, leaves
C. light, chloroplasts
D. oxygen, chlorophyll
Answer:
C. light, chloroplasts
Explanation:
A scientist hypothesized that oxygen atoms from both carbon dioxide and water are used to make glucose during photosynthesis. However, experimental results using oxygen isotopes showed that all of the oxygen from the water ended up in the oxygen molecules that were produced. None of the oxygen from water was found in glucose.
What should the scientist do to best gain scientific understanding of this topic?
a. Analyze the results, and change the experimental methods to retest the hypotheses in a different way.
b. Discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods.
c. Analyze the procedural errors that took place in the experiment, and summarize these in a conclusion statement.
d. Repeat the experiment and adjust new data to support the original hypothesis.
The scientist Discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods; option B.
What is an experiment?An experiment is a research or test conducted in order to prove or disprove a hypothesis.
An experiment is conducted using steps or procedures based on an explanation given to an observation.
The results of the experiment by the scientist disproved his hypothesis.
Therefore, the scientist should discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods.
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pls help I will mark brainlest
Answer:
Renewable resources can be replaced by natural processes as quickly as humans use them. Examples include sunlight and wind. Nonrenewable resources exist in fixed amounts. They can be used up.
I Hope this will help you if not so advance sorry :)
5. How could looking at the canopy help determine the difference between a forest and a
woodland?
Answer:
Forests naturally have a closed canopy permitting very little light to penetrate to the ground below. While woodlands have a more open canopy for light to go through it.
Explanation:
What is one thing people can do to prevent phosphorus pollution in bodies of
water?
A. Use less fertilizer.
B. Burn more fossil fuels.
C. Plant fewer trees.
D. Buy more bottled water.
Answer:
use of fertilizer
Explanation:
Use of fertilizers in the proper amount, at the right time of year and with the right method can significantly reduce how much fertilizer reaches water bodies.
Which is an example of genetic drift?
Answer:
Explanation:
Genetic drift, gene flow, mutations, and natural selection are responsible for the change in the gene pool over time. Example of genetic drift: a population of rabbits with alleles B and b, both alleles are present in equal frequencies p = 0.5 and q = 0.5 if 10 parents reproduce the probability of having an offspring with alleles B or b is 0.5; however, by chance, a slight difference in the offspring allele frequency might occur due to random sampling. As a result, in the next generation, the allele frequencies will change slightly to new frequencies by chance to become p = 0.4 and q = 0.6. in the following generations, the random sampling of alleles continues and the change in allele frequency will be greatly different from the initial 0.5 frequency due to genetic drift. Even though genetic drifting is one of the factors that participate in the evolutionary process of the genetic pool by increasing or decreasing a certain allele’s frequency, however, it does not influence the adaptation of individuals to the environment since the affected genes may be harmful or beneficial genes.
Resources:
Masel, J. (2011). Genetic drift. Current Biology, 21(20), R837-R838.
Kliman, R. M. (2016). Encyclopedia of evolutionary biology. Academic Press.
Maloy, S., & Hughes, K. (Eds.). (2013). Brenner’s Encyclopedia of Genetics. Academic Press.
Clark, M, A., Douglas, M., & Choi, J. (2018). Biology 2e. Openstax
©BiologyOnline. Content provided and moderated by BiologyOnline Editors.
Bacteria species live in the intestinal tracts of many types of mammals. These bacteria consume the partially digested food the mammal eats but also help to complete digestion of the food for mammals. This represents a ________________ relationship between species.
A) Predation
B) Mutualistic
C) Competitive
D) Commensalism
Answer:
B) Mutualistic
Explanation:
A mutualistic relationship is one of the symbiotic relationships that involves two organisms whose actions benefit one another. In mutualism both parties interact with one another and gain from one another.
According to this question, a bacteria species live in the intestinal tracts of many types of mammals. The bacteria helps the mammal to completely digest the food while the mammal provides shelter and food for the bacteria. This represents an example of MUTUALISTIC RELATIONSHIP.
A nonnative species of plant is introduced into a forest. Which of the
following would be most likely to prevent this plant from becoming an
invasive species?
O A. The plant is able to reproduce quickly in this ecosystem.
OB. The forest ecosystem lacks animals that eat the plant.
O C. The forest ecosystem has very low biodiversity.
O D. The plant must compete with tough native species.
Answer:
D- the plant must compete with tough native species
Explanation:
if the plant has to compete with tougher native species ots probably less likely to grow quickly and take over
which of the following describes the function of nucleic acids?
Answer:
A
Explanation:
DNA
Answer:
Option A
Explanation:
The functions of nucleic acids have to do with the storage and expression of genetic information. Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis
pls mark brainliest
Why making anti-viral medicines is harder than making anti-bacterial medicines ?
Also Is Virus a living parasites?
Answer:
Making anti-viral drugs is more difficult than making anti-bacterial medicines because viruses have very few biochemical mechanisms of their own. They make use of host machinery which replicates. So it is very much difficult to find the targets where these drugs get interfered by not making any harm to the host. Thus, it is not easy to design an antiviral drug with high safety and effectiveness.
Explanation:
And i would say virus is a parasites but not a living parasite according to md
Answer:
Because antivirals can damage host cells where the viruses reside.
I hope this helps
all viruses are obligate parasites,that is they lack metabolic machinery of their own to generate energy or to synthesize proteins,so they depend on host cells to carry out these vital functions...
Use the drop-down menus to complete the hypothesis of the first group of researchers. During a drought, the decrease in rainfall will reduce the amount of vegetation that can grow and increase the occurrence of natural fires, so an elevation in Select… and a reduction in Select… should be found in the cores.
Answer:
Microscopic charcoal, Vegetation.
Explanation:
As the researchers conducting research in the Nile region identified that an increase in temperatures leads to an increase in droughts and reduction of natural vegetation and thereby the chances of the occurrence of natural fires.If there is a high concentration of carbon dioxide in the blood stream, it will diffuse into the _______
A. Hemoglobin
B. Alveolus
C. Capillary
D. Protein Channel
If there is a high concentration of carbon dioxide in the bloodstream, it will diffuse into the Capillary (Option C).
What are pulmonary capillaries?Pulmonary capillaries are small blood vessels that are able to perform gas exchange.
The process of gas exchange in the respiratory system is fundamental for carrying out cellular respiration by obtaining oxygen from the air.
In conclusion, the high concentration of CO2 in the bloodstream diffuses into the capillaries (Option C).
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should shellfish, which is labeled frozen but reicieved thawed, be accepted
The founder effect occurs when Multiple Choice large groups of individuals leave their home population and establish new settlements, mating only among themselves. small groups of individuals leave their home population and establish new settlements, mating only among themselves. many members of a population die, resulting in a great loss of genetic diversity. many members of a population reproduce causing too much genetic diversity within the population. small groups of individuals leave their home population and join established settlements, and mating with natives.
Answer: small groups of individuals leave their home population and establish new settlements, mating only among themselves.
Explanation:
The founder effect is what happens when a small group of individuals leave their home population in order to establish new settlements. They will then mate only amongst themselves and colonize the area without mixing with the natives.
As a result of the founder effect, there is less genetic variation in the new population than in the home one because the smaller number of individuals who left would not possibly be able to carry all the genes in the home population. The only genes that would be passed on are those of the small individuals.
Gangguan pada sistem pencernaan sering kali terjadi karena kebiasaan buruk, seperti pola makan yang tidak teratur dan sembarangan. Salah satu dampak dari kebiasaan buruk yaitu penyakit maag atau gastritis. Coba jelaskan oleh Anda mengapa dapat terjadi?
Answer:
i don't know answer of this question
Answer:
Periode yang lama tanpa makanan cenderung menyebabkan refluks asam, gastritis, dan asam lambung. Jumlah cairan pencernaan yang berlebihan dapat mengikis lapisan usus Anda dan menyebabkan bisul
Individuals with a mutation in the gene for apolipoprotein B-100 produce very low levels of this protein, which is a component of LDL. How would accumulation of fat in the liver be affected and would this result in hypercholesterolemia or hypercholesterolemia
Answer:
Fats would accumulate in the liver and the individual would show hypocholesterolemia
Explanation:
Familial hypercholesterolemia is a genetic disorder caused by a reduction and/or defect in the low-density lipoprotein (LDL) receptor. Moreover, apolipoprotein B is the unique protein component of LDL, which plays a critical role in lipid metabolism by binding the LDL receptor. Familial defective apolipoprotein B-100 refers to an inherited disorder associated with mutations of the apolipoprotein B-100 that leads to moderate or severe cases of hypercholesterolemia. Mutations in apolipoprotein B-100 are associated with a reduction in the binding capacity of LDL to the LDL receptor, thereby leading to hypercholesterolemia.
What group of archaebacteria is both thermophilic and acidophilic?
Pyrogens
Methanogens
Thermoacidophiles
Halophiles
Answer:
Thermoacidophiles
What adaptations did Charles Darwin notice in the finches of the Galapagos Islands that helped him develop his theory of evolution by natural selection?
A. All of the finches looked the same regardless of the island from which they came.
B. The finches had the same beak sizes and shapes as the mainland finches.
C. The finches had gone extinct from the islands due to volcanic activity.
D. The finches had beaks of different sizes and shapes that were suited to the available food.
Answer:
the answer is D
Explanation:
hope this helps:)
Charles Darwin noticed that the finches had beaks of different sizes and shapes that were suited to the available food. Option D is correct.
Changes in their beak size and shape have allowed them to adapt to different food sources: seed, insect, cactus flower and fruit, or even bird’s blood. Adaptive radiation is a well-known feature of the Galapagos finches.
Darwin concluded that these differences allowed the finches to better adapt to the food in their specific habitat - thin sharp beaks where the birds feed on insects and grubs and large claw-like beaks where they feed on buds, fruits, and nuts.
So the correct option is D.
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You have been asked to help a top nutrition researcher conduct human experiments on vitamin C. As the subjects walk into the laboratory, you distribute all the vitamin C pill bottles to the girls and all the placebo pill bottles to the boys. The researcher instantly informs you that there are two errors in your research practice. What steps should you have done differently?
a. given all the boys the vitamin C and the girls the placebo, and told them what they were getting
b. Distributed the bottles randomly, randomized the subjects, and told them what they were getting.
c. Told the subjects which group they were in, and prevented yourself from knowing the contents of the pill bottles.
d. Prevented yourself from knowing what was in the pill bottles, and distributed the bottles randomly to the subjects.
Answer:
Option D
Explanation:
Prevented yourself from knowing what was in the pill bottles, and distributed the bottles randomly to the subjects.
How are protons and neutrons conserved as a star ages?
Answer:
Students identify that atoms are not conserved in nuclear fusion, but the total number of protons plus neutrons is conserved. ... Helium and a small amount of other light nuclei (i.e., up to lithium) were formed from high-energy collisions starting from protons and neutrons in the early universe before any stars existed.
please answer urgently
you dont need to explain it
Answer:
a, chromatin
Explanation:
Which Statement isna conclusion?
A. It's better to give people balloons than cut flowers that will die.?
B. Florist Put cut flowers in sugar water, so flowers in sugar water stay fresh longer?
C. How can cut flowers stay fresh for a longer period of time?
D. cut flowers placed in sugar water fresh longer than flowers placed in regular water.
Answer: C
Explanation:
