The process of obtaining food is known as _____ and requires specialized mouthparts
A) ingestion
B) digestion
C) absorption
D) excretion
A
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Using the NeoR/Tk system of introducing gene replacements into mice (as described in the text), which of the following would identify those mouse cells that were the result of homologous recombination?
A. NeoR only B. Tk only C. NeoR and Tk D. Neither NeoR or Tk
Grafting is used to grow all varieties of edible apples. What does grafting involve?
a. repairing a damaged stem of a plant to continue its growth b. inducing polyploidy in plants c. growing new roots and shoots from extensions of a parent plant d. inducing a cutting from one plant to fuse with the tissues of another plant e. artificially inducing individual cells to divide and form an embryo
Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate pollution is also a suspected cause of anoxic "dead zones" in the ocean. Which of the following might help reduce nitrate pollution?
A) growing improved crop plants that have nitrogen-fixing enzymes B) adding nitrifying bacteria to the soil C) adding denitrifying bacteria to the soil D) using ammonia instead of nitrate as a fertilizer
Which of the following is an example of an eating disorder?
A. Eating enough to cause obesity. B. Anorexia nervosa. C. Bulimia. D. All of these answers are true.