Tomatoes carry a gene called fw2.2 that encodes a protein made during early fruit development?the job of which is to repress cell division
Additionally, researchers have identified a second gene called fas that controls the number of compartments in the mature fruit. Artificial selection leading to the production of very large tomatoes has apparently capitalized on ________. A) alleles associated with low production of the repressor protein and an increase in the number of fruit compartments
B) alleles associated with high production of the repressor protein and an increase in the number of fruit compartments
C) alleles associated with low production of the repressor protein and a decrease in the number of fruit compartments
D) alleles associated with high production of the repressor protein and a decrease in the number of fruit compartments
A
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If a scientist wanted to determine if a forest environment had been polluted, which of the following groups of organisms typically would be the best indicator for the presence of pollutants?
A. amphibians B. insects C. mammals D. birds E. fish
An allele is ____ if its effect masks that of a
____ allele paired with it.
a. recessive; codominant b. codominant; recessive c. recessive; dominant d. dominant; recessive e. incompletely recessive; dominant
Which of the following statements is FALSE regarding a rightward shift in the hemoglobin-oxygen dissociation curve?
A) Affinity for oxygen is decreased. B) Hemoglobin unloading of oxygen is increased. C) It can be caused by a decrease in 2,3-BPG. D) Oxygen loading onto hemoglobin is decreased. E) A rightward shift usually occurs in active tissue.
What would happen to the carbon cycle if all decomposers suddenly died and were not replenished?
What will be an ideal response?