The end of the Pleistocene epoch was marked by a mass extinction of

A) shallow-water marine invertebrates.
B) dinosaurs and other large reptiles.
C) small mammals.
D) large mammals.


D

Biology & Microbiology

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The FRAX A site near the tip of the long arm of the X chromosome is associated with a form of intellectual disability known as Martin-Bell syndrome, or ____________________

Fill in the blank(s) with correct word

Biology & Microbiology

Which group of animals are living representatives of the theropods, a lineage of bipedal predatory dinosaurs?

a. birds b. crocodiles and alligators c. snakes and lizards d. turtles e. mammals

Biology & Microbiology

All mRNA transcripts begin with

a. methionine. b. a ribosome. c. AUG. d. the P site. e. an anticodon.

Biology & Microbiology

Active transport occurs ________ the concentration gradient across a cell membrane.

A. against B. passively against C. toward D. away from E. in between

Biology & Microbiology