Question

label each of the three cell parts with its main function.
contain the information that the cell uses for growth and activities
control which substances enter and leave the cell
make lipids and steroid hormones and help the ribosome make proteins
provide strength and stiffness to the cell
break down sugar and release energy that the cell can use
direct cell activities by sending instructions to different parts of the cell

Explanation:

1. The top - most labeled cell part (the red - colored one) is the mitochondrion. Mitochondria are known as the "powerhouses" of the cell. Their main function is to break down sugar (through cellular respiration) and release energy in the form of ATP that the cell can use for various activities.
2. The middle - labeled cell part (the orange - colored, tubular - like structure) is the endoplasmic reticulum. The endoplasmic reticulum has two types - rough (with ribosomes) and smooth. The smooth endoplasmic reticulum makes lipids and steroid hormones, and the rough endoplasmic reticulum helps ribosomes (attached to its surface) make proteins.
3. The bottom - labeled cell part (the purple - colored, spherical structure) is the nucleus. The nucleus contains DNA, which has the information that the cell uses for growth, development, and carrying out its activities. It directs cell activities by sending instructions (in the form of mRNA for protein - coding genes, etc.) to different parts of the cell.

Answer:

1. break down sugar and release energy that the cell can use
2. make lipids and steroid hormones and help the ribosome make proteins
3. contain the information that the cell uses for growth and activities