Answer:A
Explanation:
did it on edgenueity 2020
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in heritable traits of a population over time. The term "natural selection" was popularised by Charles Darwin who compared it with artificial selection, now more commonly referred to as selective breeding.
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Increased levels of CO2 decreases DO levels in the water and suffocates organisms, leading to population drops that can cause a genetic bottle neck effect, thus decreasing overall biodiversity. This could lead to extinction
Blood is a specialized connective tissue. It's extracellular matrix is blood plasma which transports dissolved nutrients,hormones,and carbon dioxide in the form of bicarbonate