while waiting for the school bus, it begins to rain. this is an example of:

voluntary response

involuntary response

external stimulus

internal stimulus

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime