Toward the end of the Proterozoic eon, multicellular animals emerged. The first animals were

A. Fish.
B. Reptiles.
C. Invertebrates.
D. Chordates.
E. Tetrapods.


C. Invertebrates.

Biology & Microbiology

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A(n) ____ provides nutrients in germinating seedlings of eudicots

a. suspensor b. epicotyl c. hypocotyl d. endosperm e. cotyledon

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How many daughter cells are produced in meiosis?

a. 0 b. 1 c. 2 d. 4

Biology & Microbiology

Most species of Gram-positive bacteria are

a. photoautotrophic. b. photoheterotrophic. c. chemoautotrophic. d. chemoheterotrophic. e. photochemoautotrophic

Biology & Microbiology

The B form of the DNA double helix contains a wider major groove and a narrower minor groove because the two polynucleotide strands are not positioned directly opposite one another in the helical cylinder.

Answer the following statement true (T) or false (F)

Biology & Microbiology