Answer:
The structures that are responsible for the movement of chromosomes to the center of the cell in metaphase is the spindle fibers, the cell attaches the centromeres to the spindle fibers to pull the sister chromatids to the center
In anaphase the sister chromatids are separated at the centromere and are pulled to the opposite poles of the cell by the spindle fibers
Explanation:
The structures responsible for the movement of chromosomes to the center of the cell in metaphase and their separation in anaphase would be the spindle fibers.
The spindle fibers are formed from microtubules near the two poles of a dividing cell. Spindle formation starts from prophase and continues to grow and extend towards the centromere of chromosomes.
At metaphase, the spindle fibers would have successfully attached to each chromosome at the kinetochore of their centromeres. Once this is done, the spindle fibers start shortening, pulling sister chromatids apart towards opposing poles in the process.
The shortening of the spindle fibers serves as the vehicle that transports sister chromatids to the poles.
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• Distinguish between cytoplasm and cytosol
Answer:
Cytoplasm Meaning
Cytoplasm is the component of the cell surrounded by the cell membrane. All the cell organelles are present in the cytoplasm. It helps in large cellular activities such as glycolysis or nuclear division. The inner concentrated region of the cytoplasm is called the endoplasm, whereas, the outer region of the cytoplasm is called ectoplasm.
Cytosol Meaning
Cytosol is known as the matrix of the cytoplasm. It surrounds the cell organelles in eukaryotes. In prokaryotes, all the metabolic reactions occur here.
Thus, we can infer that while cytosol is the fluid contained in the cell cytoplasm, cytoplasm is the entire content within the cell membrane.
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A system with a greater input than output would experience:
a. a decrease in storage
b. no change in storage
c. an increase in storage
d. zero storage
e. compound interest
PLEASE HELP
Answer:
The answer is either a or b. Im pretty sure its A! Hope you do great!
Explanation:
Yea its A!
Two other parents think their baby was switched at the hospital. The mother has blood type "A," the
father has blood type "B," and the baby has hand type "AB."
Answer: the baby is theirs because they’re A and B carriers.
Explanation:
Mutations that neither benefit nor harm the organism have/ a positivea negative /an aggressive / a neutral / effect on the organism's survival.
Answer:
Mutations that neither benefit nor harm the organism have a neutral effect on the organism's survival. This is called a neutral mutation or a silent mutation.
What condition is necessary for a genetic change that occurs in one individual to be spread to other individuals?
A. a common gene pool
B. a common phenotype
C. a similar habitat
D. a similar niche
Answer:
a
Explanation:
A common gene pool is a need for a genetic alteration that occurs in one person to be passed on to other people. The aggregate genetic makeup of a species or group is referred to as its gene pool.
What is the scenario with the genetic change in the population ?The whole of the population's alleles, or genetic variations, that may be transmitted from parents to children through reproduction. If two people share a gene pool, a genetic alteration experienced by one person can transmit to the other person.
This is so that the person who had the genetic change's progeny won't inherit the altered gene. It is not essential for a genetic modification to be passed on to other people for them to have a common phenotype. The traits or outward appearance of a phenotype of an organism, which is based on its genotype (the organism's genetic make-up). Although an organism's genotype can affect its phenotype, there isn't always a clear connection between the two.
Consequently, a shared phenotype is not a need for a genetic mutation to be passed on to other people. Similar environment and niche requirements are not essential for a genetic mutation to propagate to other people, either.
A niche is the function that an organism plays in its environment, whereas a habitat is the actual setting in which an organism lives. Although changes in habitat or niche can have an impact on an organism's genetic composition, they are not prerequisites for a genetic mutation to propagate to other people.
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A neutral atom that lost one or more electrons
This is called an ion, more specifically, a cation — an ion with a positive charge.
Having observed changes in the greenhouse without animals present, the students decide to
place a few small herbivores, such as mice and rabbits, throughout the greenhouse to see the
effect of cellular respiration. Order the sentences below from 1–4 in the most logical sequence to
describe the movement of carbon and flow of energy, starting with photosynthesis in plants.
Reorder answers
1.Plants synthesize large carbon-based molecules, including lipids, proteins, and complex carbohydrates.
Reorder answers
2.Plants use the sun’s energy to combine carbon dioxide from the atmosphere with other carbon compounds.
Reorder answers
3.When the animals eat the plants they obtain energy and raw materials required for their life processes.
Reorder answers
4.Cellular respiration generates carbon dioxide as a waste product that is released into the atmosphere.
Answer:
2. Plants use the sun’s energy to combine carbon dioxide from the atmosphere with other carbon compounds.
1. Plants synthesize large carbon-based molecules, including lipids, proteins, and complex carbohydrates.
3. When the animals eat the plants they obtain energy and raw materials required for their life processes.
4. Cellular respiration generates carbon dioxide as a waste product that is released into the atmosphere.
Explanation:
Naturally, Plants and animals have their own roles to play in the environment. Photosynthesis is a process carried out by plants to synthesize their own food in form of organic molecules. This process kicks off energy and matter transfer in ecosystems.
According to this question, animals like mice and rabbits were introduced into a green house to see the effect of cellular respiration. Based on this, energy and matter flow will occur in the greenhouse as follows:
- Plants use the sun’s energy to combine carbon dioxide from the atmosphere with other carbon compounds.
- Plants synthesize large carbon-based molecules, including lipids, proteins, and complex carbohydrates.
- When the animals eat the plants they obtain energy and raw materials required for their life processes.
- Cellular respiration generates carbon dioxide as a waste product that is released into the atmosphere.
In what type of environment does gastric protease function best?
Answer:
This enzyme works best at a temperature of 35°C and a pH of 8. B. This enzyme works best at a temperature of 50°C and a pH of 12. C.
Explanation:
Based on their name you can guess that
the Aplacophora have
a many part (greater than 2) shell
a two part shell
NO shell
a one part shell
Answer: NO shell
Explanation:
Aplacophora have no shell, at least not in their current form. They are molluscs that are found in all four oceans. Aplacophora have different species (around 320) which are subdivided into two groups which are Solenogastres and Caudofoveata.
Alpacophora are generally small in length even though some can grow to 12in and can be confused for worms at first because they are worm-like.
If a population has an allele A1 frequency of 0.04 and an allele A2 frequency of 0.96, what is the expected frequency of the A2A2 genotype
Answer:
A2A2 = 0.9216
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
PLEASE HELP ME :(
Describe the possible genotypes and phenotypes of the offspring of this cross. Label each option with percen
R= red fruit
r=yellow fruit
RR X Rr
Please choose the answer. This is a multiple choice.
Which of the following best describes the theory of natural selection?
The genetic makeup of a population gradually changes from one generation to the next due to spontaneous mutation.
Living organisms change over time due to the flow of energy, which is a key factor in determining what kinds of organisms can live in a particular community.
There is variation among the members of a species. Some of this variation is genetically determined and so can be passed on to future generations on chromosomes inherited from the parents.
Some individuals have genes that increase their chances for survival and reproduction. These individuals are more likely to reproduce and pass on their genes, causing their genes to become more common in the next generation.
There is a struggle for existence among the members of a population. Cooperation allows several species to exist in one area, while competition tends to eliminate species.
Answer:
Some individuals have genes that increase their chances for survival and reproduction. These individuals are more likely to reproduce and pass on their genes, causing their genes to become more common in the next generation.
Explanation:
The basic idea of natural selection is that environmental conditions determine how well the characteristics of organisms contribute to the survival and reproduction of the organism; organisms that do not have these traits may die before reproduction or be less fertile. As long as environmental conditions remain the same or close enough for these traits to remain adaptive, these traits will become more common in populations. The loss of an ecological niche of a species or overcrowding as a result of an increase in abundance can significantly alter the adaptive characteristics required for survival. In this case, and also in any environment where survival is determined more by ecology than secondary sex characteristics, ecological choice takes place.
what is the lac operon. Thorough explanation please :)
Answer:
The lac operon of E. coli contains genes involved in lactose metabolism. ... It normally blocks transcription of the operon, but stops acting as a repressor when lactose is present. The lac repressor senses lactose indirectly, through its isomer allolactose. Catabolite activator protein (CAP) acts as a glucose sensor.
Use Sammi's model as an example to explain why cells are the building blocks for human bodies?
Answer and Explanation:
The cell is a basic functional and structural unit of life. All living organisms are made up of cells. The human body contains approximately 100 trillion cells in our blood, skin, nerves, muscles, bones, and brain. Humans have 200 diverse forms of cells that come in different sizes and shapes. Each cell performs a specific function in the human body. There are four main types of cells: nerve cells, muscle cells, epithelial cells, and connective tissue cells. Nerve cells are specific for communication. These cells send signals from the brain to glands and muscles that control functions. Nerve cells receive sensory information is from the skin, the ears, and the eyes and send this information to the brain. Epithelial cells cover the interior of hollow body organs such as digestive organs or blood vessels. Muscle cells are specific for contraction. The body cannot move without muscles. Connective tissue cells protect against foreign invaders and also provide strength to the body.
Answer:
Cells are the building blocks for human bodies since cells have diverse sections and each performs specific duties. A cell refers to the simplest, basic unit of life. The circulatory system's various components are depicted on the model using everyday objects. From the model, it can be seen that some of the parts that are represented include the heart, blood vessels, capillaries, and digestive tract. This illustrates that for blood to be pumped into the body, different organs have specific roles to play just like the cells have different functions to play in the human body.
Explanation:
Over time, how have animals developed different traits?
Answer:
yes
Explanation:
over the years animals have developed different traits they learned from each other and observed by humans
The preserved remains of ancient organisms are:
Group of answer choices
fossils
artifacts
homologous structures
DNA.
what will happen if one of the levels in the biological organization will not perform its function properly?
Answer:
It would affect the functionality of the other levels including the organism
Explanation:
The level of biological organization is a hierarchical step consisting of how a multicellular organism forms. According to this level of organization, CELLS are the simplest unit of life and the collection of cells with a similar function is termed TISSUE. Tissues form ORGANS, organs form ORGAN SYSTEMS and finally, a collection of all the systems in the body forms the ORGANISM.
Based on this, one would observe that each level is related to the next in such a way that one forms from the other. Hence, if one of the levels in the biological organization will not perform its function properly, the other levels will be affected. For example, if the kidney cells do not perform it's function, it would affect the functionality of the kidney tissues, kidney organ, the excretory system, and the organism at large.
If one of the levels in the biological organization does not perform its
function properly, it will have a negative effect on the other levels and
organisms as a whole.
Organism comprises of cells which is the smallest unit of life and aggregates to form tissues. The tissues then aggregate to form organs and the organs aggregate to form a system.
When one of the levels are affected , it brings about non-functionality of the
system which is the highest level and the organism in which they are found in for its optimal functioning and metabolic processes.
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Structurally, the plasma membrane is best described as a
Answer:
the plasma membrane is best described as membrane found in all cells that separates the interior of the cell from the outside environment. The plasma membrane regulates the transport of materials entering and exiting the cell.
Explanation:
Structurally, the plasma membrane is best described as a selectively permeable membrane that permits specific molecules to pass in and out of the cell.
What is a Plasma membrane?A plasma membrane may be defined as a type of biological membrane that is considerably found in all plants and animal cells. The purpose of this membrane is to separate the interior surroundings of the cell from the outside environment.
According to the context of this question, the plasma membrane is a semi or selectively permeable membrane which allows the in and out movement of specific molecules within the cell. It includes molecules like water and other gaseous compounds that can pass through the cell membrane directly.
Therefore, structurally, the plasma membrane is best described as a selectively permeable membrane that permits specific molecules to pass in and out of the cell.
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What features of larkeys affect their survival?
What traits helped larkeys survive when they moved to the prairie environment?
What traits helped larkeys survive when they moved to the forest environments?
What factors in the environment affected the survival of larkeys?
Answer:
el sapo
Explanation:
Spotted larkeys were difficult for bobcats to see in the forest because they mixed in with the dappled light coming through the trees. Larkeys with short legs might hide from the bobcats by ducking behind shrubs. Bobcats could easily notice striped larkey in the dense jungle.
What are the features of larkeys to affect their survival?Striped larkeys were tougher for the coyotes to locate in the prairie because they mixed in with the prairie grass.
The ability to sprint quicker gave long-legged larkeys a better chance of eluding the coyotes. However, because of the surrounding grass, spotted larkeys were simple for the coyotes to spot.
Therefore, The prairie larkey's short legs and spots and the forest larkey's long legs and stripes both failed to help them withstand the pressure.
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Diffusion of nutrients across a cell membrane can be called a form of Multiple Choice bulk transport. exocytosis. osmosis. active transport. passive transport.
Answer:
passive transport
Explanation:
Diffusion is one of the ways molecules/substances move or is transported. It is the process whereby substances move from a region of higher concentration to a region of lower concentration until there is an even distribution. Movement via diffusion occurs down a concentration gradient i.e high to low.
Since diffusion occurs down a concentration gradient, which is difference in concentration of a substance, it requires no energy in form of ATP to occur. This kind of transport which requires no energy input is called PASSIVE TRANSPORT, in contrast to active transport which requires.
HELP PLEASE !!!!
Students made a claim that the human body is made of different kind of cells. They conducted a investigation to test their claim, which of the following provides evidence that would support this claim?
A. Samples taken from different parts of the body are all made of the same cells.
B. One cell from the body was made of many different parts.
C. Skin cells from two different people were found to be different.
D. Cells collected from different parts of the body had varying structures and functions
Answer:
Cells collected from different parts of the body had varying structures and functions
Answer:
D. Cells collected from different parts of the body had varying structures and functions
Explanation: Because you have all kind of different kinds of cells in your body and they al do different things.
Question 5 (1 point)
In comparing the number of chromosomes in a body cell to that in a sex cell, a body
cell has twice the chromosome number of a sex cell
True
False
Answer:
it is True for this question
It is true that the number of chromosomes is twice in a body cell in comparison to the sex cell. Therefore, option A is correct.
What are chromosomes?The thread-like chromosomes that convey the genomic information from cell to cell are formed of protein and a single DNA molecule. Chromosomes are found in the nucleus of cells in both plants and animals, including humans.
The very long, thin DNA fibers in most chromosomes are covered with packing proteins; in eukaryotic cells, the histones are the most significant of these proteins.
Sex chromosomes and autosomes are the two primary types of chromosomes found in many organisms with distinct sexes. Body cells are diploid and sex cells are haploid, which means the number of chromosomes is twice in the body cells as that in the sex cells. Therefore, option A is correct.
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what is located outside the cell wall in a prokaryotic cell
Answer:
capsule
Explanation:
Answer:
The Prokaryotic Cell
Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid. Most prokaryotes have a cell wall outside the plasma membrane.
Explanation:
Brainliest?
14. The neuromuscular junction is
Which are the Nucleic acids include
Answer: lipids
Explanation:
Fatty acids and triglycerides have a hydrophilic region, but are primarily long hydrophobic hydrocarbon chains
Explain how information is stored in nucleic acids
Answer:
Genetic information is stored in the sequence of bases along a nucleic acid chain. The bases have an additional special property: they form specific pairs with one another that are stabilized by hydrogen bonds. The base pairing results in the formation of a double helix, a helical structure consisting of two strands.
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Explanation:
13. With the massive amount of plant life, ample rainfall and favorable temperatures, you might think
that tropical rainforests would be large net producers of oxygen, and yet surprisingly, they are not! With
your knowledge of photosynthesis and cellular respiration, can you explain why this might be true?
Think about what happens when a leaf drops or fruit from a tree is eaten.
Answer:
Tropical rainforests such as the Amazon have been said to produce so much of Earth's oxygen when in fact this is not necessarily true.
Plants do indeed use Carbon dioxide during photosynthesis and the end product is Oxygen. The amount of oxygen produced however is more or less equivalent to the amount of Carbon dioxide taken in as atoms cannot be multiplied. With Carbon dioxide comprising only 0.04% of air, the oxygen produced is not as much as one would think.
After these trees produce Oxygen, they will also use it during respiration to produce energy which means that they would be sucking in most of the oxygen that they created. This would therefore reduce the net oxygen coming from these trees.
Another thing is that when plant life dies and is decomposed, the carbon dioxide that it stored from will be released back into the atmosphere. Leaves falling and fruits eaten will have this effect as well and since this happens a lot in tropical rainforests, their net oxygen production decreases.
Select the neurological problems that primarily
affect people who are fifty years or older.
Alzheimer's disease
Parkinson's disease
epilepsy
stroke
multiple sclerosis
Answer: Alzheimer’s, Parkinson’s, Stroke
Explanation:just took quiz
The neurological problems that primarily affect people who are fifty years or older include Alzheimer's disease, Parkinson's disease, and stroke.
What are neurological disorders?Neurological disorders refer to different types of cognitive mental problems that affect overall health.
Some of the most common neurological disorders include:
EpilepsyStrokeAmyotrophic Lateral SclerosisDementiaParkinson's DiseaseAge generally increases the risk of suffering neurological disorders, thereby it is advisable to maintain healthy diet habits to maintain mental health.
In conclusion, the neurological problems that primarily affect people who are fifty years or older include Alzheimer's disease, Parkinson's disease, and stroke.
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The human race was traced to how many million years ago?
Answer:
12 billion years and beyond
Explanation:
Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years. One of the earliest defining human traits, bipedalism -- the ability to walk on two legs -- evolved over 4 million years ago.
Match the following functions to the correct type of tissue.
movement and circulation
control and coordination
stability and support
Answer:
movement and circulation because it perform movement and circulation function
Answer:
muscle tissue
nervous tissue
muscle tissue
Explanation:
i did it on edge ;)
