2. which scientist's ideas eventually lead to the theory that earth is several billion years old?
alfred russel wallace
jean baptiste lamarck
georges cuvier
charles lyell

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

archaebacteria are found in in forest soil.

hope i spelled it right lol

hope i

-lavira: )

the supermassive black hole is in the middle of the galaxy.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.