Which of the following may occupy more than 90% of a mature plant cell's volume?
a. chromoplasts
b. the rough endoplasmic reticulum
c. the central vacuole
d. the nucleus
Ans: c. the central vacuole
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In the figure above, at which of the numbered regions would you expect to find cells at metaphase?
A) I and IV B) II only C) III only D) IV only E) V only
Vascular plants hydrate photosynthetic cells using _________, whereas bryophytes do soVascular plants hydrate photosynthetic cells using _________, whereas bryophytes do so using _____________
A. surface water; soil water B. soil water; surface water C. xylem; phloem D. xylem; surface water
Primitive reptiles first appeared during the _____ period.
A. Carboniferous B. Cambrian C. Devonian D. Ordovician E. Silurian
Bryophytes, like club mosses and certain other tracheophyte plants, require
A. soil to reproduce sexually. B. shade to reproduce sexually. C. water to reproduce sexually. D. sunlight to reproduce sexually. E. air to reproduce sexually.