Biology Revision

The middle part o f the spinal chord with nerve cell bodies that make it grey

The process whereby the pollen from the anther moves to the stigma.

Vena Cava, Pulmonary artery, Aorta, Pulmonary vein

The outer part of the spinal chord containing axons myelin sheaths.

a distincet self - supporting system of organismss interacting with each other and with a physical environment.

Paaces where specific organisms live.

The organisms of a particular species found at any one time in an ecosystem

THe population of all the species found in a particular ecostysem at any one time.