The gentoo penguins of antarctica depend on the icy habitat for nesting areas for their young. how could increased methane in the atmosphere affect the population of gentoo penguins in antarctica? . (a)the penguin population will increase due to longer and colder winters.. (b)the penguin population will decrease due to longer and colder winters.. (c)the penguin population will increase due to shorter and warmer winters.. (d)the penguin population will decrease due to shorter and warmer winters.

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