CAM8_UNIT1_PLANTS

Plants need what to carry out photosynthesis ?

• oxygen, sunlight, and water

• carbon dioxide, sunlight and water

• oxygen, carbon dioxide and water

• carbon dioxide, oxygen and sunlight

Biomass is:

• dead and decaying biological matter

• a unit of measure that gives the mass of dead cells

• living biological cells

• a unit of measure that gives the mass of living cells

Plants use photosynthesis to make:

• food and oxygen

• food and carbon dioxide

• water and oxygen

• water and carbon dioxide

You are carrying out an experiment to see if plants need light. You do this by testing two samples of seeds, one in the light, and one in the dark, and seeing if they germinate. What variable should stay the same throughout the experiment?

• amount of light

• amount of water

• number of seeds

• temperature

Leaves are green and roots are white because

• leaves contain chlorophyll, but roots don't

• roots contain chlorophyll, but leaves don't

• leaves absorb green light but roots do not

• roots absorb green light, but leaves do not

Select all that apply:

A leaf is adapted for photosynthesis and plant growth because

• their cells contain chlorophyll

• it is very thin, so light can reach all the cells inside them

• veins carry water to the cells

• it has a stalk that attaches the leaf to the plant

• water can enter the leaf through stomata

The topmost layer of a leaf is the

• palisade layer

• spongy layer

• stomata

• waxy layer (cuticle)

• upper epidermis

The function of the cuticle (waxy layer) on the leaf is to

• keep it looking shiny

• stop the leaf from turning brown

• keep the upper epidermis together

• stop the leaf cells from drying out

The layer of cells in a leaf where most of the photosynthesis occurs is the

• waxy layer

• upper epidermis

• palisade layer

• spongy layer

• lower epidermis

The function of the stomata in leaves is to

• allow water to enter the leaf

• create spaces for guard cells

• let carbon dioxide get into the leaf

• let oxygen get into the leaf