Are plant nuclei always larger than animal nuclei?

a. Yes
b. No


b

Biology & Microbiology

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What cytokine stimulates plasma cell secretion of IgE and IgG, and increases the number of class II MHC molecules on B cells and macrophages?

A) interleukin-4 B) interferon- C) interferon- D) interleukin-5 E) interleukin-10

Biology & Microbiology

An examination of fossil records shows that three modern species all had a common ancestor. This is an example of 

A. polyploidy. B. divergent evolution. C. convergent evolution. D. three subspecies.

Biology & Microbiology

The term ________ is given to any foreign substance that stimulates a specific immune system response.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which is characteristic of codons (Select all that apply)?

a. are three-base sequences of mRNA b. are complementary to anticodons c. are base triplets d. code for amino acids e. are three-base sequences of tRNA

Biology & Microbiology