Why have reptiles successfully adapted to land?
A) They have a two-chambered heart to maximize oxygen utilization.
B) They lack gills at any point during their development.
C) They are endothermic.
D) They nurse their young.
E) They produce eggs that resist dehydration.
E
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Birds are able to maintain relatively constant body temperature regardless of external temperature. Therefore, birds are
a. homeopathic. b. homeothermic. c. ecdysozoans. d. apodans. e. amniotes.
As the density of a population increases, dispersal usually decreases
Indicate whether the statement is true or false
It is possible to remove calcium from compact bone by soaking the bone in vinegar for an extended period of time. Once the calcium is gone, the bone should be
A) more rigid and inflexible. B) about half the size as before soaking. C) extremely flexible. D) completely dissolved.
The former kingdom Prokaryotae has been divided into two (domains/phyla/classes) in the current taxonomy.
Fill in the blank(s) with the appropriate word(s).