The tall ferns that we typically see in the tropics and temperate woodlands are the ________
A) sporophytes
B) gametophytes
C) gametes
D) spores
A
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Which of the following is a component of the blood-brain barrier?
Each of the following statements about the citric acid cycle is true except
A) Oxidation by transfer of electrons to coenzymes occurs at two steps. B) Decarboxylation to release CO2 occurs at two steps. C) Substrate-level phosphorylation generates ATP/GTP at one step. D) Acetate enters the citric acid cycle and joins a four-carbon acceptor molecule to form citrate. E) The cycle involves the ordered activity of eight enzymes.
In a comparison of birds and mammals, having four limbs is _____
A) a shared ancestral character B) a shared derived character C) a character useful for distinguishing birds from mammals D) an example of analogy rather than homology
Within their territory, pack animals such as wolves exhibit a uniform distribution
Indicate whether the statement is true or false