Reflexes may be coordinated by the brain or by the spinal cord.

In reflexes co-ordinated by the brain, there are no relay neurones.

Suggest why there is a difference in the mean speed of the impulse for the two reflexes.

Which of these chinese regions is the most densely populated?

What process is responsible for new tissue growth and the healing of Ben's knees?

How does the human urinary system filter waste from the blood store it and then get rid of it? it for science

Is the sporophyte of mosses ever independent of the gametophyte explain

The Federal agency primarily responsible for protecting our environment from contamination by hazardous materials releases is: a. The Federal Emergency Management Agency B. The Department of Transportation C. The Department of Labor D.

What is the chemical in leaves that absorbs light?

If a DNA double helix strand contains 3.6 billion based total, and there are 0.8 billion adenine bases contained in that strand, how many cytosine bases are there?

Compare/contrast under nutrition to malnutrition

Explain how having nerve cells clustered around the edge of its bell is advantageous to a medusa

Mutations are rare and occur because of? -An error in DNA replication -natural event such as an earthquake -Migration of organisms to a new population