Recent studies have demonstrated evolution in populations over a span of time as short as ____
a. single years
b. decades
c. centuries
d. thousands of years
e. millions of years
A
Biology & Microbiology
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Runners are modified stems that resemble roots and are also known as ____
a. stolons b. rhizomes
c. bulbs d. corms e. Tubers
Biology & Microbiology
Which two terrestrial biomes are the most similar with regards to rainfall?
A) desert; taiga B) temperate grassland; desert C) desert; temperate forest D) rainforest; desert E) temperate forests; rainforests
Biology & Microbiology
A(n) __________ is a virus that infects only bacteria.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
The region of each antibody molecule where amino acid composition is very different from one clone of B lymphocytes to another is the
A. variable region. B. constant region. C. hinge region. D. light region. E. joining region.
Biology & Microbiology