Answer:
Chromatin is a substance within a chromosome consisting of DNA and protein. The DNA carries the cell's genetic instructions. The major proteins in chromatin are histones, which help package the DNA in a compact form that fits in the cell nucleus. Chromatin structure plays a key role in regulating gene expression by allowing DNA accessibility to transcriptional machinery and transcription factors.
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<span>Different
mutations accumulate in two species once they diverge because they can no
longer mate and exchange mutated genes.Once species diverge, their chance of
mating and exchanging mutated genes are generally reduced to zero.</span>
The purple coloured sea urchins increases as starfish eats other colours, this type of selection represents Disruptive selection.
<h3>
What is Disruptive
selection?</h3>
Disruptive selection is also called diversifying selection, describes changes in population in which extreme values for a trait that are favored over intermediate values.
So we can conclude that purple coloured sea urchins increases as starfish eats other colours, this type of selection represents Disruptive selection.
Learn more about selection here: brainly.com/question/25261401
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there no radius for diagram
Species suited to a particular niche