Why must sea otters consume 25% of their body weight in food every day?
What will be an ideal response?
This is most likely the result of the necessity of maintaining a high metabolic rate in these warm-blooded animals that live in relatively cold waters.
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Animals that weigh more than 100 pounds are considered as
A. extinct. B. endangered species. C. safe from extinction. D. sensitive species. E. megafauna.
The vertebrate ectoderm is the origin of the _____
A) nervous system B) liver C) pancreas D) heart E) kidneys
In a chloroplast, the stroma is
A) a pore in the outer membrane. B) a stack of thylakoids. C) the region between in the inner and outer membranes. D) a connection between the grana. E) a gel-like matrix between the inner chloroplast membrane and the thylakoid membrane.
________ are viruses that attack bacteria
A) HIV B) bacteriophage C) influenza D) adenovirus