Which hormone is released by nerve impulses?

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Modern whales developed their traits through natural selection what occurs during the process of natural selection

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .