Which of the following events will occur in response to gravitropism?
A. The guard cells will swell with water due to an increase in sodium ions which will cause the plant to grow upright.
B. Because of the change in the plant's 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.
C. The stems on the shady side of the plant will elongate due to the presence of auxin.
D. The tendril of the plant will coil around any type of substrate that it comes into contact with.
Answer: B
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Which of these groups is most closely related to gorillas?
a. old world monkeys b. lemurs c. lorises d. new world monkeys e. tarsiers
Viral proteins can damage host cells by which process?
a. producing endotoxins b. preventing transcription of viral nucleic acids c. increasing the rate of fermentation within the host d. causing a decline in coordination and increased irritability e. overwhelming the host cell with a large number of viruses
Which of the following statements regarding plasmodesmata is false?
A) Plasmodesmata penetrate plant cell walls. B) Plasmodesmata carry chemical messages between plant cells. C) Plasmodesmata carry nutrients between plant cells. D) Plasmodesmata are found in plants and animals.
At the end of the citric acid cycle, most of the energy remaining from the original glucose is stored in
A) CO2. B) pyruvate. C) ATP. D) NADH.