Athin covering that the cells in all living things have

The control center of a cell in any living thing. A thin covering that the cells in all living things have. Determines what enters and leaves. An organelle found in plant cells that is important in making glucose.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .