Liverworts are the most primitive group of non-vascular plants.

a. Conifers
b. Ginkophytes
c. Cycads
d. Gnetophytes


a. Conifers

Conifers have the most variety of species of the gymnosperms. Most are tall trees that usually bear scale-like or needle-like leaves, and they are specially adapted to live in cold, dry climates.

Biology & Microbiology

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a. cell motility. b. providing mechanical strength for cells. c. nuclear pore structure. d. All of the above e. None of the above

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The site on a chromosome where microtubules attach during cell division is the

A) chromatid. B) centromere. C) histone. D) telomere. E) locus.

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The process of conversion of ammonia to nitrate is referred to as ________.

A. nitrogen fixation B. denitrification C. nitrification D. ammonification

Biology & Microbiology