When do cells undergo exocytosis?
a. when secreting protein and wastes from the cell
b. when replicating
c. when ingesting nutrients
d. when pumping protons down a concentration gradient
Ans: a. when secreting protein and wastes from the cell
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Refer to Figure 40.12 in your text. If you found a mammal skull that had large, pointed canines and relatively narrow, blade-shaped molars and pre-molars, you could infer that it came from an animal specialized for feeding on:
A. primarily meat. B. primarily tough plant material. C. primarily soft plant material, such as fruit. D. a combination of meat and tough plant material. E. a combination of meat, soft plant material such as fruit, and tough plant material.
Which of the following describes the function of minerals?
a. facilitating cellular processes b. assisting enzyme production c. generating phospholipids d. promoting a sense of satiety
The period following dormancy of a seed is called
a. germination. b. abscission. c. guttation. d. scarification. e. desiccation.
According to geological evidence, oxygen levels in the atmosphere began to increase about 2 billion years ago. This favored the evolution of multicellular, terrestrial organisms because:
A. More oxygen was available for cell respiration B. More oxygen was available for photosynthesis C. Some of the oxygen was used to help establish the ozone layer, and protect against harmful UV radiation D. All multicellular organisms require oxygen to survive E. More than one above is correct