When a chromosome pair fails to separate correctly in meiotic division, what is it called?
a. chromosome deletions
b. crossing-over
c. nondisjunction
d. trisomy

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?