Science Quiz Lesson 3

What are the differences between plants and animals?

Animal cells are only found in animals. Plant cells are only found in plants.

Plant cells are often larger than animal cells. Animal cells are

irregularly/spherical shaped and plant cells are rectangular in shape. Plant

cells have additional organelles (cell wall, chloroplasts, large central

vacuole).

What organelles are common in both plant and animal cells?

Cytoplasm, cell membrane, nucleus, mitochondria, Endoplasmic

Reticulum, Golgi bodies, vacuoles

Which organelles are found only in plant cell?

Chloroplasts, larger central vacuole, cell wall

What are the functions of the Large Central Vacuole?

A. Temporarily holds wastes

B. Helps maintain an internal pressure

C. Keeps the leaves and stems large and firm

What are the functions of the Cell Wall?

A. Very hard structure made of cellulose

B. It provides strength to the cell as well as protection

What are the functions of the chloroplasts?

It makes food (glucose) through photosynthesis

It contains chlorophyll which allows them to absorb the energy from

the sun

Explain photosynthesis in plants.

Chloroplasts take carbon dioxide (CO2) and water (H2O) from the

environment and light energy from the sun to create glucose(CH2O) and

oxygen (O2).

What is the main purpose of photosynthesis?

The main purpose is to create sugar for food and oxygen for animals.

What would happen if photosynthesis stopped in all plants?

Almost all living things on earth would eventually die.