The absorption of fats differs from that of carbohydrates in that _____
A) fat absorption primarily occurs in the stomach, whereas carbohydrates are absorbed from the small intestine
B) carbohydrates need to be emulsified before they can be digested, whereas fats do not
C) most absorbed fat first enters the lymphatic system, whereas carbohydrates directly enter the blood
D) fats, but not carbohydrates, are digested by bacteria before absorption
C
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Which of the following types of behavior describes the way that mice find their way through mazes?
A. Habituation B. Imprinting C. Reasoning D instinct E. Trial and error
Which of these animals uses collar cells to obtain food for intracellular digestion?
A) Humans B) Earthworms C) Protists D) Sponges E) Hydra
Ribosomal subunits ____________.
A. come together in threes to form functional units B. are composed of mRNA and structural proteins C. are synthesized in the cytoplasm D. converge with tRNA when mRNA is to be translated E. are transcribed from the complementary strand of DNA that is used for tRNA transcription
Where may Muller's ratchet be at work in the genomes of sexually reproducing organ-isms?
a. Y chromosome genes with female-specific function b. Y chromosomal genes with general function c. Autosomal genes of Drosophila males (there is no crossing-over in Drosoph-ila males) d. Nonrecombinant sections of autosomes e. A and B