The ____ phylum has an estimated 350,000 known living species of vascular, seed-bearing plants, and is the dominant

group of land plants today.



a. Cycadophyta
b. Anthophyta
c. Gnetophyta


d. Coniferophyta
e. Ginkgophyta


ANSWER: b

Biology & Microbiology

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Microscopic or macroscopic degenerative changes or abnormalities in infected host cells and tissues are called ________.

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

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If carbon has an atomic number of 6 and an atomic mass of 14, how many neutrons does it have?

A. 8 B. 7 C. 6 D. 14 E. There is not enough information to determine this.

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In this figure, which organ is associated with the breakdown of fat globules?

a. A b. B c. C d. D e. E

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When calcium levels decline, the __________

secrete(s) __________, which __________ osteoclast activity. a. parathyroids; calcitonin; suppresses b. thyroid; calcitonin; suppresses c. thyroid; calcitonin; enhances d. thyroid; PTH; suppresses e. parathyroids; PTH; enhances

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