aortic valve

Subject:

the process whereby a particular change causes a response which reverses that change.

Subject:

(also called the stele) the region that includes the pericycle and the vascular tissues in a...

sterilise

Subject:

to destroy all living micro-organisms.

biomes

Subject:

regions in particular geographical locations with similar climates and vegetation types.

evolve

Subject:

to change over a period of time in response to new environmental conditions.

X-Kit Achieve!