Most carbohydrates, lipids, and proteins are digested, and most nutrients and water are absorbed in the ________
a. small intestine
b. stomach
c. large intestine
d. esophagus
a
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Botanically, the fibers in your cotton t-shirt are _____
a. angiosperm seeds d. fibers from pine needles b. gymnosperm seeds e. cellulose-rich hairs c. lignin fibers
What is the final stage in ecological succession?
a. Repopulation of an area b. Early colonization c. A natural disturbance d. Climax community
Extraembryonic membranes arise from the
a. embryonic disk. b. blastula. c. placenta. d. gastrula. e. morula.
Suppose that two strains of E. coli—strain a (bio- met- leu+ thr+ thi+) and strain b (bio+ met+ leu- thr- thi-)—conjugate. If the two strains are grown on minimal medium, what is the most likely genotype of their offspring?
a. bio+ met- leu- thr- thi+ b. bio+ met+ leu+ thr+ thi+ c. bio+ met+ leu- thr- thi+ d. bio- met- leu- thr- thi+