2.2

Question 1

What is the main organ for gaseous exchange in plants?

Answer 1

Leaves

Question 2

True or False: Stomata are primarily responsible for gas exchange in plants.

Answer 2

True

Question 3

Fill in the blank: The process of gas exchange in plants occurs mainly through ______.

Answer 3

Stomata

Question 4

What gas do plants take in during photosynthesis?

Answer 4

Carbon dioxide

Question 5

What gas do plants release as a byproduct of photosynthesis?

Answer 5

Oxygen

Question 6

Multiple Choice: Which part of the leaf is responsible for the majority of gas exchange? A) Epidermis B) Mesophyll C) Stomata

Answer 6

C) Stomata

Question 7

What is the role of guard cells in plants?

Answer 7

To regulate the opening and closing of stomata

Question 8

True or False: Gaseous exchange in plants can occur through the roots.

Answer 8

False

Question 9

Fill in the blank: During the day, stomata generally ______ to allow gas exchange.

Answer 9

Open

Question 10

What environmental factor can cause stomata to close?

Answer 10

Drought or high temperatures

Question 11

Multiple Choice: Which gas is NOT involved in plant respiration? A) Oxygen B) Carbon dioxide C) Nitrogen

Answer 11

C) Nitrogen

Question 12

What is the main purpose of photosynthesis in plants?

Answer 12

To convert light energy into chemical energy

Question 13

True or False: Transpiration is a process that aids in gas exchange.

Answer 13

True

Question 14

What is the primary function of mesophyll cells in leaves?

Answer 14

To facilitate photosynthesis

Question 15

Fill in the blank: The exchange of gases in plants is essential for ______ and ______.

Answer 15

Photosynthesis and respiration

Question 16

Multiple Choice: Which type of mesophyll is primarily involved in gas exchange? A) Palisade B) Spongy C) Epidermal

Answer 16

B) Spongy

Question 17

What happens to stomata at night?

Answer 17

They generally close to conserve water.

Question 18

True or False: The number of stomata can vary between different plant species.

Answer 18

True

Question 19

What is the role of the waxy cuticle on leaves?

Answer 19

To reduce water loss

Question 20

Fill in the blank: The process by which water vapor exits the leaf is called ______.

Answer 20

Transpiration

Question 21

Multiple Choice: Which environmental condition typically increases the rate of transpiration? A) High humidity B) High temperature C) Low light

Answer 21

B) High temperature

Question 22

What structure in the leaf helps to prevent excessive water loss?

Answer 22

Cuticle

Question 23

True or False: Gas exchange in plants is an active process requiring energy.

Answer 23

False

Question 24

What is the significance of gas exchange for plants?

Answer 24

It allows for photosynthesis and respiration, essential for growth and energy.

Question 25

Fill in the blank: The movement of gases in and out of the leaf occurs by ______.

Answer 25

Diffusion

Question 26

What is the primary function of stomata in plants?

Answer 26

The primary function of stomata is to regulate gas exchange, allowing carbon dioxide to enter and oxygen to exit during photosynthesis.

Question 27

True or False: Stomatal opening is primarily controlled by the turgor pressure of guard cells.

Answer 27

True

Question 28

Fill in the blank: Stomatal opening is triggered by the influx of _______ into guard cells.

Answer 28

potassium ions

Question 29

Which environmental factor can cause stomata to close?

Answer 29

Drought or high temperatures can cause stomata to close to prevent water loss.

Question 30

What is the primary effect of water deficiency on stomatal opening in plants?

Answer 30

Water deficiency primarily causes stomata to close to reduce water loss.

Question 31

True or False: Stomatal closing during water deficiency helps to conserve water in plants.

Answer 31

True

Question 32

Fill in the blank: When plants experience water deficiency, the guard cells become ______, leading to stomatal closure.

Answer 32

flaccid

Question 33

Which of the following factors is NOT directly affected by water deficiency in relation to stomatal function? A) Guard cell turgor B) Photosynthesis C) Soil pH

Answer 33

C) Soil pH

Question 34

How does prolonged water deficiency impact a plant's ability to photosynthesize?

Answer 34

Prolonged water deficiency reduces stomatal opening, limiting CO2 intake and thus decreasing photosynthesis.