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4.1.4 Quiz: Evidence for Evolution
Question 5 of 10
2 Points
How is DNA used as evidence for evolution?
O
A. All species have the same amount of DNA
O
B. All species have the same genetic code.
O
c. All species have the same number of genes.
D. All species have the same genes.

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. calcium carbonate is strengthened by phosphorus.

explanation:

the question isn't complete here so i can't right an answer '_'

i believe it would be c: tons.

c. heat from the poles back down towards the equator.