Which statement about whisk ferns is FALSE?

a. They exhibit dichotomous branching.
b. One representative is Psilotum.
c. They lack true leaves.
d. They lack true roots.
e. They lack true stems.


e

Biology & Microbiology

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The production of antibiotics is a form of antagonism called ________.

A. symbiosis B. mutualism C. antibiosis D. synergism

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Pseudoephedrine, based on the chemical structure of ephedrine from the Gnetophyte genus Ephedra, was used as a treatment for

A. cancer. B. congestion. C. headache. D. malaria. E. erectile dysfunction.

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The lowest part of the uterus is the

a. vagina. b. vulva. c. oviduct. d. cervix. e. urethra

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Retroviruses have a +ssRNA as their genome. In order to complete an infection, they must first make a ________ molecule, which they use to direct the synthesis of mRNA.

A. dsRNA B. DNA:RNA hybrid C. ?ssRNA D. dsDNA

Biology & Microbiology