You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal also has _____
A) simple, but not compound, eyes
B) two pairs of antennae
C) a head, thorax, and abdomen
D) tracheae and spiracles
Answer: A
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The cycad lineage probably arose from ____
a. club mosses b. seed ferns c. whisk ferns d. ginkgos e. palms
If a sperm cell contains 6 chromosomes, it must have come from an original parent cell that contained ________ chromosomes
A) 4 B) 6 C) 12 D) 24
When are atoms most stable?
A) when they have the fewest possible valence electrons B) when they have the maximum number of unpaired electrons C) when all of the electron orbitals in the valence shell are filled D) when all electrons are paired
The causative agent of Lyme disease is
A. Borrelia hermsii. B. Ixodes pacificus. C. Leptospira interrogans. D. Ixodes scapularis. E. Borrelia burgdorferi.