Save. teachpe.com. On the surface, human bones---especially dead ones---seem to be made of rigid material. However, the make-up of bones is quite complex--they are alive, growing and changing connectors in the human body. Bones are not completely solid, but rather a mixture of elements that range from soft to hard.
Kept under lock and key, the Devils Hole pupfish (Cyprinodon diabolis) has teetered on the brink of extinction since it made the federal list of endangered species in 1967.his poses a risk to the shrinking pupfish population, however. To reduce the impact of the egg collection, biologists should gather pupfish eggs in the fall, when the fish population is larger, rather than in the spring, according to the new study, for which a scientist analyzed the extinction risks for the pupfish.
for publication --- the spawning sequence of the rare and endangered Devil's Hole pupfish, Cyprinodon diabolis Wales. The photographs were taken as part of a study of the social behavior and embryological and larval development of this attractive, elusive species. 1975 study of the food habits of the Devil's Hole pupfish determined that diatoms were the most important food in fall and summer. Also included among the pupfish food is amphipod Hyalella, an unidentified ostracod, and protozoans.