Explain how the stems and roots of a plant will respond at the cellular level if it is placed upon its side.
What will be an ideal response?
The plant will experience gravitrophism. Because of the change in the plants position it will have sediments of statoliths (amyloplasts containing starch granules) settle towards the lower side of the stems and roots and come into contact with the cytoskeletal elements. At this point there will be a change in auxin distribution so that the cells on the upper surface of the root elongate so that the root curves downward. The cells on the lower surface of the stem elongate so that the stem curves upwards.
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What is a requirement for glycolysis to proceed?
a. Glucose must enter the mitochondria. b. There must be an input of energy from ATP. c. Oxygen must be available. d. Heat must be supplied. e. Carbon dioxide must be available.
Diatoms tend to be grazed in temperate coastal waters by:
a. amphipods. b. dinoflagellates. c. copepods. d. lobsters. e. radiolarians
Errors in DNA replication can come from:a
DNA polymerase. b. DNA ligase. c. complementary base pairing. d. the sun’s UV radiation. e. Okazaki fragments.
A commonly used test for muscular endurance is:
What will be an ideal response?