By the end of the Devonian period, which of the following plants populated the landscape?
a. flowering plants and trees
b. mosses and other bryophytes
c. ferns, horsetails, and seed plants
d. algae and early vascular plants
c. ferns, horsetails, and seed plants
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Heat is released in both photosynthesis and cellular respiration as a byproduct.
A. True, both processes release heat B. Fall, neither photosynthesis nor respiration release heat as a byproduct C. False, only cellular respiration releases heat as a byproduct D. False, only photosynthesis releases heat as a byproduct
The specific compound that is capable of receiving light energy as the first step in sensory transduction is
A. retinal. B. rhodopsin. C. cone opsin. D. vitamin A. E. melanin.
In the axoneme, nexin
A) is an incomplete microtubule. B) slides microtubules past one another. C) projects inward at each doublet. D) links adjacent doublets. E) is a complete microtubule.
Four of the five hormones listed below directly affect
another endocrine gland. Select the exception. a. somatotropin b. corticotropin c. luteinizing hormone d. follicle-stimulating hormone e. angiotensin