Oysters are an invertebrate the lives today in brackish waters along coastal zones
When a geologist working in stratified rocks observes a limestone bed with oyster fossils overlain by beds with clam and echinoderm fossils indicative of marine conditions, the fossils probably indicate ________.
A) the oysters evolved into clams and echinoderms
B) the oysters went extinct while these rocks were being deposited
C) the environment changed as sea level rose, displacing the oysters environment with marine conditions represented by the clams and echinoderms
D) There is not sufficient information to reach any conclusion from these observations.
C
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Which of the following hydrolyzes proteins only on the C=O side of tryptophan, phenylalanine and tyrosine?
A) carboxypeptidase B) chymotrypsin C) pepsin D) trypsin
A new gravel road is cut into the side of a mountain just north of Anchorage, Alaska. As the snow melts in June, the fine gravel and sand of the disturbed region quickly tumbles into the bottom of nearby streams
The addition of this fine gravel and sand changes the stream by A) decreasing the number of plants and animals that live there. B) decreasing the number of plants but increasing the number of animals that live there. C) increasing the number of plants but decreasing the number of animals that live there. D) increasing the number of plants and animals that live there.
Sound travels faster in water than in air.
Answer the following statement true (T) or false (F)
Which of the following ecosystems is considered a center of biodiversity?
A. coral reefs in the Bahamas B. deciduous forests in Vermont C. high desert in Utah D. grasslands in Kansas