An enzyme is active in the stomach of an animal but quickly loses its activity when it leaves the stomach. This example illustrates that enzymes are
A) specific to the organs in which they are produced.
B) inactivated by movement.
C) sensitive to changes in pH.
D) digested in the small intestine.
E) consumed by the quantities of substrate in the small intestine.
Answer: C
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Suppose a gene from a cow is introduced into a frog. This results in a ________ transgene
Fill in the blank(s) with correct word
From the figure above, what can we determine about the location of the food source?
A) The waggle dance in the top figure indicates that the food is directly under the hive. B) The waggle dance in the bottom figure indicates that the food is to the west of the hive. C) The waggle dance in the top figure indicates that the food is close to the hive. D) The waggle dance in the bottom figure indicates that the food is 90 degrees to the right of the Sun. E) The vigor of the waggle dance indicates the location of the food relative to the Sun.
A trait that is adaptive in one context and later turns out to have adaptive value in a rather different
context is called
a. paedomorphosis. b. anagenesis. c. cladogenesis. d. exaptation. e. endemic.
An immediate source of energy for exercising muscle cells is _____
a. creatine phosphate b. aerobic respiration c. anaerobic respiration d. fermentation e. glycolysis