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ElenaW [278]
3 years ago
14

Repeated and prolonged episodes of stress can cause a state of exhaustion within the immune system which can ultimately cause

Biology
1 answer:
Rudik [331]3 years ago
3 0
<span>Repeated and prolonged episodes of stress can cause a state of exhaustion within the immune system which can ultimately cause infection.</span>
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When the body becomes dehydrated, a chemical signal is sent that causes nephrons in the kidneys to absorb more water and excrete
Rama09 [41]
Feedback loop. Hope this helps! :)
4 0
3 years ago
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the seed's food source will be used up by the time the new plant developsleaves. why does the plant no longer need the cotyleddo
Xelga [282]

Answer: The plant becomes self-sufficient when leaves grow onto it.

Explanation: The leaves will start photosynthesis instead of the Cotyledons providing nourishment for the seed.

4 0
2 years ago
Why is it important that the cell's DNA is duplicated before cell division? Thanks!
Yakvenalex [24]
So the DNA can be copied to make more of themselves.<span />
3 0
3 years ago
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How can reproductive barriers form sympatric populations while their members remain in the same geographic area?
grandymaker [24]

Answer: Polyploidy

Explanation:

Polyploidy is defined as the phenomenon by which cells, tissues or organisms with three or more complete sets of chromosomes originate. Such cells, tissues or organisms are called polyploids.

If the genomes of a polyploid species come from the same ancestral species, it is said to be autopolyploid or autoploid. And if they come from two different ancestral species, it is said to be allopolyploid or alloploid. <u>Depending on the number of complete chromosome sets that the species has it is called triploid (3X), tetraploid (4X), pentaploid (5X), hexaploid (6X) and so on, where X is the monoploid number, and not to be confused with the haploid number. </u>

Redundant genetic elements of polyploid organisms can be transformed into single copies by sub-functionalization, neofunctionalization mechanisms or by the appearance of certain mutations.

<u>Two populations are sympatric when they exist in the same area and thus frequently encounter one another. </u>In general, different species cannot interbreed and produce healthy and fertile offspring due to barriers known as reproductive isolation mechanisms.  Polyploidy speciation is common in plants but rare in animals. So, animal species are much less tolerant of changes in ploidy. For example, human embryos that are triploid or tetraploid are not viable, cannot survive.

4 0
3 years ago
When parents reproduce, they pass different versions of genes, or _____, for different traits to their ____.
romanna [79]

Answer:

characters

offsprings.

Explanation:

During meiosis, all various genes are separated. The inherited alleles constitute the genotype of the individual.

The transfer of parental to offspring characteristics is called heredity and the heritable features can be predicted.

7 0
2 years ago
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