The pancreas secretes enzymes that digest:
a. carbohydrates only
b. lipids only
c. protein only
d. carbohydrates and lipids only
e. carbohydrates, proteins and lipids
e
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Bone with insufficient or abnormal collagen would __________________ compared with healthy bone
A. fracture more easily B. become demineralized C. contain less hydroxyapaptite D. have less range of motion
Shiga toxin is dangerous to humans because it is an _____
a. endotoxin that kills cells b. endotoxin that illicit an immune response c. exotoxin that interferes with protein synthesis by intestinal cells d. exotoxin that disrupts nerve cell function e. exotoxin that can overwhelm the immune response and decrease blood pressure
Incest avoidance evolved in humans:
a. because breeding among close relatives leads to a higher proportion of offspring with genetic defects and, consequently, reduced fitness. b. as part of a larger fixed action pattern. c. because many bees, wasps, and ants can inflict painful, and even fatal, stings and bites. d. because in early human societies, alliances could be achieved by marrying the chief's daughter to the son of the chief of a different tribe. e. because breeding among close relatives leads to a higher proportion of offspring with increased fitness.
What is the main function of the nucleolus?
A) It produces enzymes that are then exported to the lysosomes. B) It produces cell adhesion proteins that are then exported to the cell membrane. C) It is the site of ribosome-subunit synthesis. D) It is the site of photosynthesis in photosynthetic cells. E) It is the site of cellular waste digestion and recycling.