Which structure was least likely to be present in the charophyte ancestors of land plants?

a. spores
b. gametes
c. multicellular organs
d. diploid embryos
e. chloroplasts


ANSWER: d

Biology & Microbiology

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________ , also known as "jumping genes," are examples of mobile DNA elements.

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

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Microsporidia have a unique organelle, the ________ that is used to invade the host cell.

What will be an ideal response?

Biology & Microbiology

Which of the following is most likely the result

of a neutral mutation?

a. fingerprint patterns b. larger brains c. standing upright d. digestion of cellulose e. fur

Biology & Microbiology

Ethylene oxide is

A. used as an antiseptic against anaerobes. B. sporicidal. C. only effective with high heat. D. a halogen. E. the active agent in household bleach.

Biology & Microbiology