Answer is the amount of genetic variation in a population Natural selection gets impacted by environmental factors.
The environmental factors increase or decrease the quantum of genetic variation in a population. Genetic diversity increase due to sudden and permanent change in the gene or DNA. This change is called mutation. Decrease in genetic diversity may occur when a specific allele reduces the chances of individual with that trait to reproduce. Individual with decreased genetic variation often dies before producing offspring through reproduction.
Answer:
B
Explanation:
direct and indirect activities of man that contribute to pollution and deposition of sediments.
I think it’s D. Not sure though
Answer:
The correct answer is D.
Explanation:
The madreporite, which is present in the animals of echinoderm family including sea stars, sea cucumbers and sea urchins, is a part of the circulation system and an opening on the body of the animal that allows it to filter the sea water before taking it in to it's vascular system and control what goes in and out, sort of like a mouth.
I hope this answer helps.
I like, your question... there might be I looked, for some and found these listings:
Polar Bears International (PBI)