BIOLOGY HIGH SCHOOL

Which of the following statements about rural communities is true? a. Rural communities can support any population size. b. More people in the United States live in rural communities than they did in 1900. c. Rural communities were built based on the location of available resources. d. People in developed countries are moving back to rural communities...

Answers

Answer 1
Answer: The correct answer is c. Rural communities were built based on the location of available resources. This means that places that had good land for crops or good climate had communities based around crops or tobacco, while comunities based around mining would be near mountains where mines could be found. Rural communities are usually based around some natural resource like a river or a mine or anything similar.

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Microorganisms can mutate and evolve very quickly compared to most multicellular organisms. This allows pathogenic microorganisms to infect new species. Suppose a very harmful microorganism that is quite successful at infecting hardwood trees is introduced into a forest ecosystem. What effect would this pathogenic microorganism most likely have?
Which term describes the chromosomal abnormality of having extra chromosomes?
Which term best identifies a muscle cell?
To classify an organism a scientist finds in the field, which of these will the scientist first compare to other known organisms?A. Dietary habits B. Ecological niche C. Physical structure D. Reproductive method

What happens if both sister chromatids move to the same pole

Answers

Although many cells go through both anaphase A and B motions, occasionally one motion takes precedence over the other. Poleward migration in anaphase requires the separation of the paired sister chromatids. The components that link the chromatids at the centromere are degraded by proteolysis, which causes chromatid separation.

What both sister chromatids move to the same pole?

Synapsis is the name given to this action. Crossing over happens during synapsis. DNA is transferred between two nonsister chromatids of a homologous pair of chromosomes during crossing over.

When nondisjunction occurs, the homologous or sister chromatids are drawn to one pole of the cell because the separation does not take place.

Therefore, One daughter cell would have more chromosomes than usual, and one sister chromatid would not split equally during the anaphase of mitosis.

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You end up with two cells with aneuploidy, or abnormal chromosome number. One daughter cell will have one extra chromosome, the other daughter cell will have one less than what it should have. For example, if the normal number is 46, and this happened, you would end up with one cell with 45 and one cell with 47.

What kind of cell has a large, central, vacuole

Answers

The answer is Plant cells. Plant cells have large vacuoles.

Answer:

plant cell

Explanation:

Nitrogen bases floating in the nucleus pair up with the what on each half of the dna molecule

Answers

Adenine goes with thymine and guanine goes with cytosine.
So A-T, G-C. These are free floating DNA nucleobases that pair up with one set of a DNA molecule when it is "unzipped". 

Unlike amphibians, reptilesa. have lungs to oxygenate blood.B. use single-loop circulatory system.C. have a closed circulation system in which blood circulates entirely within blood vessels.D. have ventricles that are further divided to lessen mixing of oxygen-rich and oxygen-poor blood.

Answers

The answer is D. have ventricles that are further divided to lessen mixing of oxygen-rich and oxygen-poor blood.

Amphibian hearts have 3 chambers - one ventricle and two atria. Since there is only one ventricle, oxygenated and deoxygenated blood will mix. On the other hand, lizards have a septum in the ventricle. The septum divides ventricles resulting in less mixing of oxygen-rich and oxygen-poor blood. 

The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists ofa)raw data.

b)outlier data.

c)precise data.

d)summarized data

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Answer:

The correct answer would be d) summarized data.

The summarized data gives the quick and easy description of all the observations obtained in the experiment.

The data can be summarized using different categories such as the total of the observations, frequency of the observations, mean value, variation et cetera.

It helps in deducing any conclusion from the observations such as the pattern of increase or decrease in the biological activity.
The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists of "summarized data" at the end of the study. 

Explain how a major flooding event could impact more than one sphere. Whatspheres would be involved and in what way

Answers

Flood is the result of the migration of the boundary between land and water. The spheres involved in flood are atmosphere, lithosphere and hydrosphere.

Spheres of earth - There are four levels of the Earth known as spheres that are hydrosphere (water), lithosphere (land), atmosphere (air) and biosphere (plants and animals).

Flood can have both positive and negative impact on the biospheres of the region. As the water drawn significantly, it destroy the habitats of the terrestrial organisms.

Positive impact is it can bring majority of the nutrients downstream which can help in better production of the crops.

Flood affects hydrosphere by destroying the water bodies such as rivers and lakes. Also it pollutes the water which makes it difficult for the survival of the marine or aquatic animals

So, the spheres involved in flood are atmosphere, lithosphere and hydrosphere.

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Answer:

well... since i know everything, i would say that this is bad because people can drown and we do not want people to die before they can vote.

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