Plants readily take up nitrogen from atmosphere.

A. true
B. false


B. false

Biology & Microbiology

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____ requires both a template and an appropriately placed 3' end to synthesize a nucleic acid

Fill in the blank with the appropriate word.

Biology & Microbiology

Clonal selection requires the presence of foreign antigens.

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

Biology & Microbiology

Which of the following characteristics is present in all chordates? 

A. gills B. notochord C. vertebrae D. All of the above are correct.

Biology & Microbiology

The fact that regeneration is a common type of reproduction in sea stars suggests that

A. sea stars have almost no predators. B. adult sea star cells retain the mechanism to form a complete animal. C. sea star populations have high levels of genetic diversity. D. all sea stars are haploid.

Biology & Microbiology