Which of the following statements about abscisic acid are true? (Check all that apply.)A) It is produced chiefly in mature green leaves and in fruits.B) It stimulates the growth of dormant buds.C) It promotes leaf senescence.D) It plays an important role in controlling the opening and closing of stomata.E) It plays a role in seed dormancy.
What will be an ideal response?
A, C, D, E
Abscisic acid is discussed in Section 31.8.
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This is defined as the capacity to do work.
a. metabolism b. electrolytes c. chemical reaction d. concentration e. energy
Characteristics of genetically engineered plants and plant products include
(a) better nutrition. (b) longer storage lives. (c) resistance to disease and insects. (d) all of the above.
Sexual selection, such as occurs when males compete for access to fertile females, frequently influences aspects of body form and can lead to _____
a. male/female differences b. male aggression c. exaggerated traits d. all of these
What does DNA sequencing suggest about the relationship between the nuclear and organellar genomes?
A) The same subset of mitochondrial genes has moved to the nuclear genome in all species. B) Mitochondrial genes that are found in the nuclear genome do not have introns, suggesting that movement occurred via an RNA intermediate. C) The mitochondrial and nuclear genomes are entirely independent of each other. D) Some cells have two types of mitochondria that have different genome sequences. E) Some proteins found in mitochondria are imported from the cytoplasm.