Lesson 8-The Leaf

Question 1

What is the main task for the leaves of the plant?

Answer 1

Making food for the plant and help regulate the plants water content.

Question 2

What is he role of the veins?

Answer 2

Veins carry water and other substances throughout the plant.

Question 3

What is a bundle of veins called? What do they do?

Answer 3

The XYLEM carries water and minerals up from the roots to the leaves.

Question 4

What is the stoma?

Answer 4

Stoma are tiny portals that can be opened and closed to allow the plant to exchange gases with the outside world.

Question 5

The balance of gases in our world is our atmosphere is dependent on photosynthesis. What does this mean?

Answer 5

Plants take carbon dioxide into their leaves during photosynthesis and release oxygen back to the atmosphere. Then other organisms use the oxygen and release carbon dioxide-It is a balance.

Question 6

What is transpiration? What sign is evidence that transpiration is occurring?

Answer 6

It is when the plant releases water vapor into the air (through the stoma). You can tell when transportation is occurring because drops of water is collecting on the tips of the leaves.

Question 7

How do the guard cells regulate the opening of the stoma?

Answer 7

The guard cells lie against each other, and take in water by the diffusion from their neighboring epidermal cells.

Question 8

Where is the mesophyll?

Answer 8

Between the upper and lower epidermis

Question 9

What are its layers?

Answer 9

Upper layer of tightly packed palisade cells

One or more lower layers of spongy tissues-provides room for water/gases (oxygen/carbon dioxide)

Question 10

What is the process of photosynthesis?

Answer 10

1) chlorophyll (in chloroplasts) absorbs light
2) using that energy, the plant combines water and carbon dioxide to make glucose
3) plant releases oxygen which is a byproduct back into the atmosphere
4) leaves ship the excess glucose to other parts of the plant via phloem