The position of mammals in evolution is best described as
A. they dominate life in the sea.
B. they arose from mammal-like reptiles in the Jurassic but remained small and insignificant while dinosaurs dominated the land.
C. mammals gave rise to birds.
D. they were among the first animals to live on land and their diversity is greater than all living things known.
E. All of the choices are correct.
Answer: B
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What is the leading scientific hypothesis explaining how the endomembrane system of eukaryotic cells originated?
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a. below the diastolic pressure. b. above systolic pressure. c. between the diastolic and systolic pressures. d. at none of the above times.
Trisomics are observed in humans; monosomics are not. Why?
What will be an ideal response?