The adrenal glands secrete the steroid hormone ____
a. cortisol
b. melatonin
c. calcitonin
d. glucagon
e. insulin
ANSWER: a
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For glycolysis to continue in eukaryotes, NAD+ must be regenerated. In anaerobic environments, this is accomplished by ________, which produces ________ as the end product(s)
a. fermentation / ethanol or lactic acid b. hydrogenation / NADPH c. phosphorylation / ATP d. an exchange reaction / FADH2 and NAD+
A malignant melanoma is caused by ____
a. heredity b. viruses c. chemical carcinogens d. radiation e. weakened immunity
________ organisms can function in an aerobic or anaerobic environment
Fill in the blank with correct word.
What is the key difference between protostomes and deuterostomes?
a. Protostomes are animals with soft exteriors and deuterostomes are animals with hard exteriors (i.e., shells). b. Protostomes represent a lineage of bilaterally symmetrical animals, whereas deuterostomes represent a lineage of radially symmetrical animals. c. The protostome gut develops from back to front and the second opening becomes the mouth. The deuterostome gut develops from front to back, so the first opening is the mouth. d. The protostome gut develops from front to back, so the first opening is the mouth. The deuterostome gut develops back to front and the second opening becomes the mouth. e. Protostomes represent animals that are prokaryotes, and deuterostomes represent all over animals.