A vertebrate paleontologist is hunting through chalk deposits and finds a set of fused clavicles with some other bone fragments. What has she found?
A. The remains of a bird.
B. The remains of a lobe-finned fish.
C. The remains of a mammal.
D. The remains of an amphibian.
Answer: A
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Allivibrio fischeri symbionts benefit the Hawaiian bobtail squid by
A) mimicking the light of the moon, which helps the squid avoid nocturnal predators. B) providing essential amino acids missing from the squid's diet. C) degrading the cellulosic cell walls of the phytoplankton the squid eats. D) providing essential amino acids missing from the squid's diet and degrading the cellulosic cell walls of the phytoplankton the squid eats.
Which of the following are single-celled fungi?
a. molds b. yeasts c. mushrooms d. more than one of these e. none of these
Which of the following is not an organelle?
A. lysosome B. chloroplast C. mitochondria D. ribosome E. nucleus
Which force is responsible for moving water up to the tops of the trees?
A. transpiration B. root pressure C. atmospheric pressure D. water stress E. guttation