Which of these statements is true when comparing sexual and asexual reproduction?
a. sexual reproduction allows for more rapid population growth than does asexual reproduction
b. only half of the offspring from sexually reproducing females are also females.
c. asexual reproduction produces offspring of greater genetic variety
d. sexual reproduction is completed more rapidly than asexual reproduction.
e. asexual reproduction is better suited to environments with extremely varying conditions.

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas