2.2.2 Leaves Flashcards

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1
Q

Why is the top surface of a leaf waxy?

A

To stop water escaping from the leaf.

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2
Q

Which gas diffuses into a leaf?

A

Carbon dioxide

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3
Q

Why are there fewer chloroplasts in the cells of the bottom side of a leaf?

A

Because sunlight mainly hits the top of leaves so chloroplasts aren’t needed on the bottom as much.

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4
Q

Identify the diagram

A

The structure of a leaf

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5
Q

Stomata (holes) in leaves are opened and close by special cells called…

A

guard cells

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6
Q

Idenitfiy the missing label from the structure of a leaf

A

Stoma

(a single stomata)

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7
Q

How does being thin help a leaf to carry out photosynthesis?

A

Gases can move in and out of the leaf easily.

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8
Q

Idenitfiy the missing label from the structure of a leaf

A

Guard cell

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9
Q

Idenitfiy the missing label from the structure of a leaf

A

Spongy layer

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10
Q

Why is a leaf normally dark green on top but lighter on the bottom?

A

There are fewer chloroplasts on the bottom so there is less chlorophyll.

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11
Q

How do gases and water get in and out of a leaf?

A

Through holes called stomata

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12
Q

Idenitfiy the missing label from the structure of a leaf

A

Waxy layer

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13
Q

What is the name of the tube that carries glucose around the plant?

A

Phloem tubes

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14
Q

How is the structure of a leaf suited to carry out photosynthesis?

A
  • Contain chlorophyll to capture sunlight.
  • They are thin
  • They have a large surface area
  • They have veins
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15
Q

Name the 3 main layers of a leaf

A
  1. Waxy layer
  2. Palisade layer
  3. Spongy layer
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16
Q

How do veins help a leaf to carry out photosynthesis?

A

They are made from xylem tubes which can transport water for photosynthesis to take place.

17
Q

How does a large surface area help a leaf to carry out photosynthesis?

A

A large surface area can capture as much light as possible.

18
Q

Idenitfiy the missing label from the structure of a leaf

A

Chloroplast

19
Q

Which gases diffuse out of a leaf?

A

Oxygen

Water vapour

20
Q

Idenitfiy the missing label from the structure of a leaf

A

Palisade layer

21
Q

Idenitfiy the missing label from the structure of a leaf

A

Air space