What sorts of signals does the brain use to communicate sensations, thoughts and actions?

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Which of the following typically characterizes a tropical rainforests