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.

Certain poisons are toxic to organisms because they interfere with the function of enzymes in mitochondria. this results directly in the inability of the cell to

What was the climate of the mississippian period in north america?

in a process called blank the atomic nuclei of unstable isotopes release fast moving particles and energy

Consumers can be split into three categories such as what?

Which of the following is NOT one of the main components of the cell theory? Cells are only in plants and animals. All living things are made of cells. Cells are the basic unit of life,

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?

How would the lack of water affect cellular respiration?

Different types of normal tissues in the human body have different mitotic indices. From the following list, which normal tissues would you expect to have the highest mitotic index: muscle, skin, kidney, or lung? Explain your answer.

A group of scientists decided to post their research results on the Internet instead of publishing in a scientific journal. What part of the scientific process have they skipped and why does it matter?