Which of the following organisms is helping scientists better understand the evolution of the immune system because they have a unique feature during their lifecycle?

A. planaria
B. archaea
C. cellular slime molds
D. B cells
E. viruses


Answer: C

Biology & Microbiology

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Pili may do all of the following EXCEPT

a. help cells attach to surfaces. b. function in reproduction. c. extend from the cell surface. d. be transferred between cells. e. function in cell locomotion

Biology & Microbiology

In this section of the tissue layers of a cnidarian, which item, A, B, C, or D, is a nematocyst?

1.A 2.B 3.C 4.D

Biology & Microbiology

The action of helicase creates _____.

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

Biology & Microbiology

A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

A) TACCCGGCACG B) TACCCGTGCACG C) TACCCGAGCACG D) TACCGTGCTACG E) TACCCGTGTCACG

Biology & Microbiology