Scientists have tried raising endangered whooping cranes in captivity by using sandhill cranes as foster parents. This strategy is no longer used because
A) fostered whooping crane chicks did not develop the necessary cues for migration.
B) the fostered whooping cranes' critical period was variable such that different chicks imprinted on different "mothers."
C) sandhill crane parents rejected their fostered whooping crane chicks soon after incubation.
D) none of the fostered whooping cranes formed a mating pair-bond with another whooping crane.
E) sandhill crane parents did not properly incubate whooping crane eggs.
The grey nurse shark is critically endangered on the Australian east coast.
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Scientists should use a variety of media to present the message
Some threatened and endangered species