Ais a rigid layer that surrounds a plant cell, providing structural support.
a. chloroplast
b. nucleus
c. cell wall
d. cell membrane

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems