polar ice and grass land because
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.
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:
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:
How is point source pollution different from nonpoint source pollution?
Answer:
one is more direct than the other
Explanation:
for instance pollution in a stream moving down it's tributaries into a lake or ocean.
Describe the shrublands in two sentences.
Explanation:
Land on which shrubs are the dominant vegetation. They generally show a wide range of adaptations to fire, such as heavy seed production
Please Help - ASAP
A species of insect used to be pale green in color. As its environment changed, it evolved to a dark green color that allowed it to blend in better with the plants it feeds on
Which statement best explains how this form of camouflage evolved through natural selection?
A. As the insects consumed the new darker-colored plants, pigmentation from the plants affected their own coloring, altering their genes for color. When they reproduced, they passed the trait for darker coloring on to their offspring. 19. on offse
B. Coloring mutations occurred randomly. Those mutations that were most helpful to the insects survival slowly spread through the population because insects with these mutations were more likely to survive and pass on their genes.
C. The insects were naturally drawn to plants to which their coloring blended. Those individuals with pale green coloring left this environment for an enviroment where they blended better, and individuals with dark green coloring moved in.
D .Abiotic factors in the environment changed, which caused chemical changes that affected the plants' coloring. Over time, the same chemical changes took place in the insects, affecting their coloring in the same way.
D .Abiotic factors in the environment changed, which caused chemical changes that affected the plants' coloring. Over time, the same chemical changes took place in the insects, affecting their coloring in the same way.
list three of the common physical and/or chemical agents that adversely affect the body
Physical agents are:-
Radiation.Noise.Air pollution.Chemical agents are:-
Alcohol.Carcinogens.Pesticides.What happen when our body is adversely affected?We can suffer from diseases when our body is adversely affected like:-
Headaches.Upset stomach.Elevated blood pressure.Chest pain.In many cases the disease can be fetal like Cancer.
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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.
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.
3. In guinea pigs, short hair is dominant over long hair. If a short haired SS guinea pig is crossed with a long haired ss guinea pig, what are the possible genotypes and phenotypes of their offspring and the percent chance of each?
Answer:
Explanation:
1ss 1SS 2Ss
Answer:
The ratio: 3:4
The percent: 75%
Explanation:
The gene pairs would be
Ss, Ss, Ss, ss
Three out of the four baby guinea pigs would be a short hair since the short hair is dominant and rules over the recessive long hair gene.
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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.
Scenario 1: There are 3 types of polar bears: ones with thick coats, ones with thin coats and ones with medium coats. It is fall, soon to be winter. The temperatures are dropping rapidly and the bears must be kept warm, or they will freeze to death. Many of the bears have had 2 cubs each but due to the extreme temperatures, many mothers only have one of those two cubs left. What bear will natural selection select AGAINST
Answer:
Im thinking the thin coated ones will be selected against
Explanation:
Because the temperature is dropping rapidly
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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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
For hundreds of years one species of moth has always gone back to the same type of tree in the forest to breed. A small portion of that moth population began going to a different type of tree within the same forest to breed instead. What would most likely result from this scenario
Answer:
Evolution.
Explanation:
A small portion of the moth population began going to a different type of tree within the same forest to breed instead of the older one because of the evolution. Due to this evolution, the moth is able to breed on another tree. The characteristics of some moth specie changed over several generations due to may be change in their genetic makeup so we can say that it is because of evolution.
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:
5.
The structures of proteins and nucleic acids in living organisms differ in that
A
proteins can take a variety of shapes, and nucleic acids tend to form linear chains
proteins tend to form rings, and nucleic acids tend to form globes
C
proteins tend to form helices, and nucleic acids tend to take irregular shapes.
D
proteins tend to form branched chains, and nucleic acids can take a variety of shapes
Answer:
A . proteins can take a variety of shapes, and nucleic acids tend to form linear chains
Explanation:
Proteins are consist of 50 and 2000 amino acid long and can take variety of shapes in living organisms. Two types of proteins that found in living cells are globular proteins and fibrous proteins and they have different shapes. Example of globular protein is hemoglobin and fibrous proteins are hair and nails, and collagen.
Nucleic acids tend to form linear chains from the monomers called nucleotides. Nucleotides have three components: nitrogenous base. phosphate group, and pentose sugar (5-carbon sugar) that together forms a definite linear shape. It is found in DNA of living organisms.
Hence, the correct option is "A . proteins can take a variety of shapes, and nucleic acids tend to form linear chains".
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
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.
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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Question 8
The student wants to make a model to provide information about cellular respiration. Drag and drop the responses
below to complete the model.
Answer:
Explanation:
where? mitochondria
inputs. carbon dioxide and water
outputs. glucose and oxygen
energy resources. chemical bonds
energy result. energy released
im not sure but hope this helps :)))
Which of these examples does NOT depend on the population size of organisms living in an area (density-independent)?
The availability of nuts for squirrels to eat in a forest.
The effect of chemical pollution on insects living in a pond.
The amount of space available for bats to roost in a cave.
The number of mice that are preyed upon by hawks in a field.
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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Monitoring levels of which two gases would help determine the human
impact on air quality?
A. Methane
I B. Water vapor
I C. Carbon dioxide
✓ D. Oxygen
Answer:
oxygen is the answer......
2. What is your response to the video as scientific evidence that there are actually ivory-billed woodpeckers still living in the Arkansas swamps or other areas?
Scientists studying the cricket populations on Kauai and Oahu have
also observed that flatwing males wander about more than wild type
male crickets do.
Which hypothesis best explains the observed wandering behavior in
a population consisting mostly of flatwing males?
a Wandering protects flatwing males from the parasitic fly.
b. Wandering helps flatwing males find mates in the absence of chirping
C. Wandering allows flatwing males to access new food sources
d Wandering reduces competition with male crickets that chirp.
Answer:
B/D
Explanation:
it's either B because if a flat Wing male can't find a female that likes is tripping is it helpful to go around and wander and maybe he'll find a mate
or it's D because there's a lot of crickets out in the open and where everybody else is his group gets everywhere so what I'm saying is it help to wander cuz that reduces the competition there so many male chirping that it's kind of hard to find a certain one that will attract the female
The hypothesis that best explains observed wandering behaviour in a population dominated by flatwing males is in the absence of chirping, flatwing males find mates via wandering. So, the correct option is B.
How does this hypothesis make sense?This theory makes sense since flatwing males are unable to generate the characteristic chirping sound which wild-type males make to attract females. As a result, they may need to roam around more to find partners, increasing their chances of reproducing. The other hypotheses do not appear to be as likely to explain the observed behaviour because there is no evidence that travelling is associated with access to new sources of food or protection from competition or parasites.
The hypothesis which most explains observed wandering behavior in a flatwing male-dominated population is Flatwing males find mates by roving in the absence of chirping.
Therefore, the correct option is B.
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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.
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 ;)
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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• 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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