Science Exam-Fourth IV Quarter

What is the cell membrane?

• surrounds a cell, holding the parts of the cell together. It allows needed materials, such as sugar, water, and oxygen to enter the cell.

• is the part of the cell that contains chromosomes. Chromosomes are made of materials including a chemical called DNA (deoxyribonucleic acid).

• surrounds the cell membrane. The cell wall is stiff, unlike the thin cell membrane. Cell walls give plant cells extra support and protection.

• use the energy in sunlight to turn water and carbon dioxide into oxygen and sugar. Plant cells use oxygen and sugar for respiration. Chloroplasts give plants their green color.

What is the nucleus?

• the part of the cell that contains chromosomes. Chromosomes are made of materials including a chemical called DNA (deoxyribonucleic acid).

• surrounds the cell membrane. The cell wall is stiff, unlike the thin cell membrane.

• use the energy in sunlight to turn water and carbon dioxide into oxygen and sugar. Plant cells use oxygen and sugar for respiration. Chloroplasts give plants their green color.

• surrounds a cell, holding the parts of the cell together. It allows needed materials, such as sugar, water, and oxygen to enter the cell.

What means (deoxyribonucleic acid)?

Complete:

___use the energy in sunlight to turn water and carbon dioxide into oxygen and sugar.

• Chloroplast

• cell walls

• nucleus

• cell membrane

Complete

A tough ___ surrounds the cell membrane.

• cell walls

• Chloroplast

• nucleus

• cell membrane

Complete:

Your body has about___ different kinds of cells.

Write the type of cell:

"The shape of nerve cells makes them great for communicating signals between the brain and the rest of the body."

Write the type of cell:

"Flat cells such as skin cells, often join or overlap to cover a surface. They work something like the shingles on a building’s roof."

What is a tissue?

What is an organ?