Which of the following structures help to increase the surface area for nutrient absorption in the small intestines?
A. villi and microvilli
B. villi
C. microvilli
D. tight junctions
E. villi, microvilli, and tight junctions
A
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Which of the following consume other living organisms?
I) primary producers II) herbivores III) carnivores IV) decomposers A) only II and III B) only I and IV C) only I, II, and IV D) only II, III, and IV E) only I, II, and III
Which of the following permits a single gene to code for more than one polypeptide?
In your textbook, there is a discussion of the experiment by Wigglesworth that demonstrated that PTTH (prothoracicotropic hormone) triggers molting and the release of ecdysone
In 1984, Nagasawa et al. published a paper entitled: "Amino-terminal amino acid sequence of silkworm prothoracicotropic hormone: homology with insulin." The similar amino acid sequence between PTTH and insulin suggests that: A. a common ancestral peptide evolved into peptides with different functions in insects and invertebrates. B. if PTTH were given to vertebrates it would likely trigger glucose uptake by cells. C. insulin causes molting in vertebrates.
A woman with a college education is more likely to have a large family than a woman with an eighth-grade education
Indicate whether the statement is true or false