Which feature is unique to mammals?
a. Live birth
b. Notochord
c. Nesting behaviors
d. Amniotic egg
e. Variety of tooth types
e
You might also like to view...
One important difference between the C, N, and S cycles and the P, Ca, and Si cycles is that
A) P, Ca, and Si are NOT cycled in terrestrial environments. B) the P, Ca, and Si cycles do NOT involve redox changes or gaseous forms that can alter Earth's atmospheric chemistry. C) the P, Ca, and Si cycles do NOT involve microbial activity. D) the P, Ca, and Si cycles are NOT affected by global warming or other human activity.
Silver sulfadiazine, a combination of silver and a sulfa drug, is used to
A. disinfect water for drinking. B. prevent infection of surgical wounds. C. prevent infection of second- and third-degree burns. D. counteract lead poisoning. E. treat bites from werewolves.
The only process of ATP production in cells using fermentation is
A. electron transport. B. the Calvin cycle. C. the Krebs cycle. D. glycolysis. E. photosynthesis.
One of the proposed solutions to global warming is to grow a large number of trees. This could be effective because:
A) plants are the base of all ecological food chains. B) trees would move carbon from CO2 in the atmosphere to organic molecules. C) plant carbon is different from atmospheric carbon. D) the gross primary production of trees moves CO2 into soil. E) when decomposed, plant carbon is impossible to convert back to CO2.