Which of the following is false about earthworms?
a. They are the first group to have a rudimentary
brain.
b. They are scavengers, living on detritus.
c. They have a closed circulatory system with
multiple hearts.
d. Each segment has muscles, blood vessels, and
nerves.
e. Paired nephridia cleanse the coelomic fluid and
discharge wastes.
Answer: a
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A new protein has been described that transports a growth factor across the plasma membrane. This protein is most likely a/an:
A. cytoplasmic protein. B. integral membrane protein. C. peripheral membrane protein, facing the cytoplasmic side. D. peripheral membrane protein, facing outward.
The major source of water for precipitation onto land is ____
a. evaporation from oceans b. evaporation in the upper atmosphere c. evaporation from groundwater flow d. transpiration from land plants e. wind driven water vapor from oceans
Diet-induced thermogenesis
What will be an ideal response?
A cell is limited in its size by ________
A) its ability to move waste material out B) its surface-to-volume ratio C) its ability to move nutrients in D) All of the above are correct.