Plesiosaurs, whales, and dolphins have/had ____ while compared to tetrapods
Fill in the blank(s) with the appropriate word(s).
Answer: More phalanges
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Gametophyte plants produce gametes using:a
mitosis. b. meiosis. c. fertilization. d. polyploidy. e. sporogenesis.
Radioactive isotopes are used in dating materials from the distant past. Which of the following statements about radioactive dating techniques is true?
A. It gives the general ages of rock strata. (±1 million years). B. It uses a technique in which the degree of radioactive decay is measured, the younger the rock the more radioactive decay. C. It gives exact ages of rock strata. (± 1 year). D. It uses a technique in which the degree of radioactive decay is measured, the older the rock the more radioactive decay. E. It does not work well with fossil remains that have not absorbed radiation.
Social brain hypothesis states that in general animals with a larger neocortex will be more independent because they can function more efficiently, thus negating any usefulness derived from being social
a. true b. false
Below is a figure from an experiment that was performed to measure the effect of carbonate ion (CO32-) concentration on the calcification (growth) rate of coral reefs. At which point on the graph is the ocean pH the lowest?
A) A
B) B
C) C
D) D