Human blood consists of blood groups A, B, and O. However, there is one more blood group, AB, which contains alleles A and B in the same genotype. What is this phenomenon called?

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

the dark variety, as they are not visible on the dark tree barks

explanation:

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.