Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered a type of
A) exocytosis.
B) passive transport.
C) active transport.
D) endocytosis.
Answer: B
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Which of the following adaptations to the plasma membrane allows mammals to hibernate in subzero
temperatures without their plasma membranes freezing?
a. Increase in cholesterol content only. b. Increase in protein content only. c. Increase in the number of double covalent bonds in phospholipids. d. Increase in both cholesterol and protein content. e. Increase in both cholesterol and double covalent bonds in phospholipids.
Ambergris is produced by dolphins
Indicate whether the statement is true or false
Describe the difference between an osmoregulator and an osmoconformer
What will be an ideal response?
The cow Bos primigenius (which is bred for meat and milk) has a smaller brain and larger eyes than closely related wild species of ungulates. These traits most likely arose by _____
A) natural selection, because these traits evolved in the population over time B) natural selection, because these traits were not consciously selected by humans C) artificial selection, because changes in these traits co-occurred with human selection for high milk output and high muscle content D) artificial selection, because these animals differ from their close relatives and common ancestor