In the process of splitting water during photosynthesis, the first cyanobacteria released:a
hydrogen gas.
b. oxygen gas.
c. photons of light.
d. heat from longer wavelengths of light.
e. electrons, protons, and neutrons.
B
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An individual tree can maintain a symbiotic relationship with many different species of mycorrhizae simultaneously
Indicate whether the statement is true or false.
Which of the following is NOT true about
complementary base pairing in a DNA molecule?
a. covalent bonds connect two complementary bases. b. adenine and thymine are complements. c. guanine and cytosine are complements. d. double-ring nitrogen containing bases connect to single-ring nitrogen containing bases. e. more than one of these is NOT true.
Smooth muscle has all of the following characteristics except:a
being attached to bones via tendons. b. having sustained contractions. c. requiring less ATP to maintain a high level of force. d. contracting slowly. e. having muscle fibers capable of greater shortening than striated muscle.
Which character would allow you to identify something as an echinoderm and not a chordate?
A. Dorsal hollow nerve cord B. Radial symmetry C. Pharyngeal gill slits D. Post-anal tail