Plant Unit Test Review

What is the main function of the stomata in a plant?

• They monitor the release of sugar. 

• They guard the interior cells. 

• They increase the rate of conversion of sunlight into energy for the plant. 

• They allow the exchange of gases between the plant and the atmosphere. 

Answer explanation

Stomata are the tiny openings present on the epidermis of leaves. Think about the MOUTH of a plant.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does photosynthesis compare with cellular respiration in plants?

• Photosynthesis requires sunlight, but cellular respiration does not. 

• Cellular respiration requires sunlight, but photosynthesis does not. 

• Carbon dioxide is released during photosynthesis, while oxygen is released during cellular respiration. 

• Oxygen is absorbed during photosynthesis, while carbon dioxide is absorbed during cellular respiration. 

Answer explanation

Photosynthesis NEEDS LIGHT: Cellular Respiration does NOT

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The color of a leaf with chlorophyll is ________.

• red

• brown

• green

• orange

In the fall leaves begin to turn different colors because ____.

• the carbon dioxide in the air cannot reach the leaves  

• there is less oxygen in the air 

• there is too much chlorophyll in the leaves  

• the temperature begins to drop, and leaves cannot produce chlorophyll 

Answer explanation

Remember Chlorophyll FILLS the chloroplast and makes leaves GREEN

Tags

NGSS.MS-LS1-5

Match the following5. Match the part of a plant cell with the question it best answers.

• Which part collects Water and waste products to export? 

• Cell Wall

• Which part protects the cell and maintains its shape? 

• Chloroplast

• Which part converts sunlight into energy? 

• Mitochondria

• Which part is like a power plant for the cell?

• Vacuole

Tags

NGSS.MS-LS1-2

True or False: Guard cells control the opening and closing of the stomata. 

• True

• False

True or False: Chlorophyll is the green pigment found in plants. 

• True

• False

True or False: Oxygen is needed for photosynthesis to take place.

• True

• False

Answer explanation

Oxygen is a PRODUCT - or END RESULT of photosynthesis. It i MADE not REQUIRED

Tags

NGSS.MS-LS1-6

True or False: Carbon dioxide enters the plant through the roots. 

• True

• False

Answer explanation

Water enters through the roots. Carbon Dioxide enters through the STOMATA

Tags

NGSS.MS-LS2-3

True or False: Phloem tubes carry food through the plant.

• True

• False