The nervous system relies on the insulation
of the made up on schwann cells, to
increase action potential conduction
velocity without increasing the diameter of
the axon.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

whats the answer to your question?

answer; (b) clear with a slight blue tint;