Which statement is true of Y chromosomes?
O
A. Only men have them.
O
B. All babies have them.
O
C. Women have two of them.
OD. Only women have them.

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin