In animals, which of the following help retain body heat?
A. fur, fat, and feathers
B. fur, fat, and skin
C. fur, feathers, and skin
D. fur, fat, and scales
E. fur, scales, and skin
A. fur, fat, and feathers
You might also like to view...
Cyanobacteria are best described as
A. some being photolithoautotrophs that can function as chemoheterotrophs in the dark. B. all being obligate photolithoautotrophs. C. all being obligate chemoheterotrophs. D. None of the choices are correct.
What percentage of the species that have ever lived have become extinct?
a. 1 percent b. 9 percent c. 50 percent d. 75 percent e. 99 percent
Most brain and spinal cord cells are
A) saltatory neurons. B) motor neurons. C) parasympathetic neurons. D) sensory neurons. E) interneurons.
Receptor potentials are ________ the strength of the stimulus
A) the same regardless of B) unrelated to C) inversely proportional to D) directly proportional to E) much greater than