in the mitosis of onion root experiment, why does the onion root have to be crushed into smaller pieces

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

Which anatomical plane is the only one that could not show both the sternal region and vertebral region

Why is the limitations on supplies of freshwater becoming an increasing problem despite the fact that we have desalination technologies