In muscle contraction, and myosin filaments slide across each other.
A. intermediate filaments
B. tubulin
C. flagella
D. actin
E. cilia
D. actin
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Spontaneous mutations that occur in somatic cells will be transmitted to offspring
A. true B. false
__________, products of master genes, act as long-range signals that diffuse out from a source and
form a concentration gradient. Fill in the blank(s) with the appropriate word(s).
The processes listed below represent major chemical pathways in
photosynthesis. Respond to statements 80–84 with reference to these five processes. a. light-dependent reactions b. chemosynthetic reactions c. carbon dioxide fixation d. Calvin-Benson cycle e. C4 pathway D 80. This leads to the formation of a glucose-6-phosphate from two molecules of phosphoglyceraldehyde. M 81. In this process carbon dioxide is incorporated first into an unstable intermediate compound and then into phosphoglycerate. E 82. This yields NADPH as well as ATP. M 83. This is a carbon-fixing system that precedes the Calvin-Benson cycle in some plants. M 84. PGAL molecules are formed from the reaction of PGA molecules with ATP and NADPH in this pathway.
Red algae ____.
A. are primarily marine organisms B. are thought to have developed from green algae C. contain xanthophylls as their main accessory pigments D. are mostly unicellular E. survive only in shallow water