Salivary amylase:
A. starts the chemical digestion of
carbohydrates in the mouth.
B. starts the chemical digestion of
carbohydrates in the stomach.
C. starts the chemical digestion of proteins in
the stomach.
D. starts the chemical digestion of fats in the
mouth.
E. starts the chemical digestion of proteins in
the mouth.
A
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The outcome of the Gram stain is based on differences in the ________.
A. flagella B. ribosomes C. cell wall D. cell membrane
Most of the animals of mud flats are:
a. planktonic. b. epifaunal. c. oysters. d. infaunal. e. nektonic.
The figure included shows the body temperature of lizards versus air temperature in two different habitats—open and shaded forest. Which one of the following conclusions is best supported by these data.
A. Lizards are more active in open habitats.
B. Lizards sunbathe more in open habitats.
C. Lizards in shaded forest habitats eat more to maintain their temperature.
D. The body temperature of lizards is more constant in open than in shaded forest habitats.
E. The negative effect of air temperature on body temperature is less in shaded forest habitats because the temperature varies less there.
During the pre-embryonic period, a single sperm passes through the zona pellucida. In the vast majority of cases, where does this process occur?
A) in the oviduct (fallopian tube) B) in the placenta C) in the uterus D) in the ovary