Which evidence for evolution uses impressions of plants and animals pressed into sedimentary rock?
A. fossil record
B. biogeography
C. comparative anatomy
D. comparative embryology
E. comparative biochemistry
Ans: A. fossil record
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Dinoflagellates
a. may produce red tides that poison and kill fish. b. produce a poison that builds up in the tissues of shellfish and may kill humans who eat infected shellfish. c. may undergo a population explosion that turns the ocean red or various colors. d. commonly are photosynthetic marine plankton. e. are all of these.
Which of the following represents a biological consequence of irrigation of agricultural fields?
A) lowered water tables when wells are used B) introduction of fertilizers and pesticides into the water table C) transmission of diseases by aquatic organisms D) accumulation of salt in irrigated soils in arid zones E) environmental effects of engineered structures (dikes, wells, etc.)
Which of the following structures has both a digestive and a respiratory role?
A) Esophagus B) Stomach C) Pharynx D) Nose E) Larynx
An unfortunate deer becomes stuck in quicksand at the edge of a lake and dies. A few months later, it is buried by sediment in a massive landslide, but by this time, bacteria have fully decomposed its soft tissues. Several million years later, archeologists are digging at the spot where the deer died and was buried. Would the archeologists be able to find a fossil of the deer? Why or why not?
A. Yes, because it would have fossilized before it was buried. B. Yes, because its skeleton could have been replaced by minerals to form a fossil. C. No, because it needed to be fully intact when buried to form a fossil. D. No, because bacteria continued to decompose its skeleton after it was buried.