Answer:
The thoracic and sacral curvatures of the vertebral column are <u>convex</u> while the cervical and lumbar curvatures are <u>concave.</u>
Cyclins are a family of proteins that <u>[</u><u> </u><u>A </u><u>]</u><u> </u><u>Regulate</u><u> the</u><u> </u><u>cell </u><u>cycle</u>
Answer: D. The DNA sequences for the cytochrome c genes in chimpanzees and spider monkeys are over 90% identical.
Cytochrome c gene encodes for a protein that is very common among primates. This gene does not have undergone much changes during the process of evolution. Cytochrome c is a respiratory pigment found in the mitochondria of eukaryotes.