What is the main function of RNA?
a. Copying DNA
b. Protein synthesis
c. Connecting nucleotides
d. Storing genetic material
b
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Which mammalian feature aids in both thermoregulation and communication?
a. sudoriferous glands b. sebaceous glands c. permeable skin d. vibrissae
Fats that contain ____ double bonds are liquids at room temperature, whereas fats that contain ____ double bonds are
solids at room temperature.
a. trans; cis b. cis; trans c. hydrogenated; partially hydrogenated d. partially hydrogenated; hydrogenated e. unsaturated; saturated
____________________ secrete hormones into blood. Fill in the blank(s) with the appropriate word(s)
One adaptation to flight in birds is lighter bones, which lack
A. medullary cavities. B. collagen. C. the periosteum. D. bone marrow. E. calcium.