Which statement accurately describes how identification of individuals through the use of genetic engineering is possible?
a. the y chromosome doesn't experience crossing-over.
b. the x chromosome can only be passed from a father to his son.
c. the mitochondria dna in a mother and her offspring vary greatly.
d. the dna in mitochondria is passed from mother to child in the nucleus

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Wich is not standing in the way of astronomers getting a good view of different star

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.