The central nervous system consists of the

A. sense organs B. reflexes C. brain and spinal cord D. sensory and motor neurons

Which type of reproduction lead to increased genetic variation on a population?

Approximately what percentage of sunlight pierces the rainforest canopy? 1% 99% 50% 5%

If we break matter down enough, it is made of

DNA is 39% Native American what does it mean?

What is the function of haemoglobin

Can someone describe the main theories of intelligence

Which of these statements is correct about a theory? It cannot be contradicted. It is accepted by a few scientists. It does not explain observations. It can be changed by current evidence. i think its D but im not sure

3. Which organelles would exist, in higher numbers, in the following types of cells? a. White Blood Cell house b. Cardiac Muscle Cell House

Which layer of the atmosphere does all weather take place?

A salt is added to a solution of water. Which physical property of the water is most likely to change?