Mammals evolved approximately 200 million years ago from:a

fish.
b. amphibians.
c. reptiles.
d. birds.
e. arthropods


C

Biology & Microbiology

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Although ferns and conifers maintained their diversity into the early Cenozoic era, ____ may have hastened their

decline in the early Cretaceous.

a. cycads b. gymnosperms c. angiosperms d. invertebrates e. mammals

Biology & Microbiology

Kinesin 1 and myosin II share each of the following features except

A) two heads. B) dimers formed by heavy chain tails coiled around each other. C) formation of bipolar filaments. D) plus end directed motor activity. E) ATPase activity.

Biology & Microbiology

In proteins, nitrogen bases link covalently to ribose in DNA

Indicate whether the statement is true or false.

Biology & Microbiology

HIV-1 Group M is responsible for 95% of human infections. When is it estimated that HIV-1 Group M was transferred to humans?

A) 1980 B) 1960 C) 1930 D) 1995 E) 1900

Biology & Microbiology