The fossil record indicates that the immediate ancestors of modern marine animals diversified in the ____ period, right
after the ____ extinction.
a. Ordovician; Cambrian
b. Jurassic; Triassic
c. Carboniferous; Devonian
d. Paleogene; Cretaceous
e. Triassic; Permian
ANSWER: e
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Which of the following organelles are not part of the endomembrane system?
A) peroxisomes B) Golgi complexes C) smooth endoplasmic reticulum D) endosomes E) rough endoplasmic reticulum
What is the result of calcium flow through NMDA receptors in a synapse where little glutamate has been released from the presynaptic terminal?
a. NMDA receptors are removed from the postsynaptic terminal. b. NMDA receptors are added to the postsynaptic terminal. c. AMPA receptors are removed from the postsynaptic terminal. d. AMPA receptors are added to the postsynaptic terminal.
The Montreal Protocol banned use of _____ , which contribute(s) to ozone depletion
a. DDT b. CFCs c. fossil fuels d. sulfur dioxides
Which E-value represents the highest probability of a BLAST result not being chance?
A) 1 B) 0.01 C) 1 × 10-3 D) 0.1 E) 1 × 10-4