Plant Tissue Flashcards Preview

Biology > Plant Tissue > Flashcards

Flashcards in Plant Tissue Deck (24)
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1
Q

What is a leaf

A

The leaf is a plant organ

2
Q

What are these areas?

A

(Top) Upper Epidermis, (Bottom) Lower Epidermis

3
Q

Where do the epidermis’s cover?

A

The top and bottom of the leaf

4
Q

What do epidermal cells form?

A

Epidermal tissue

5
Q

What does the epidermis do?

A

It protects the surface of the leaf

6
Q

What feature does the upper epidermis have?

A
  • It’s transparent
  • allows light to pass through to photosynthetic cells
  • covered in waxy cuticle
7
Q

What does the waxy cuticle do?

A

Reduces evaporation of water from the SURFACE of the leaf. This prevents it from drying out.

8
Q

What features does the lower epidermis have?

A

It has tiny pores called STOMATA

9
Q

What does stomata do?

A

It allows carbon dioxide to enter the leaf and oxygen to leave.
- Helps control the amount of water vapour that can pass out the leaf.

10
Q

What features does the stomata have?

A

On either side, it has guard cells

11
Q

What else is found at the TOP of the leaf?

A

Palisade mesophyll

12
Q

What does the palisade mesophyll consist of?

A

Palisade cells

13
Q

What do palisade cells have?

A

They are packed with chloroplasts

14
Q

What does chloroplast do for the leaf?

A

It absorbs light energy with CHLOROPHYLL which helps for photosynthesis.

15
Q

What is in the central area of the leaf?

A

Spongy mesophyll

16
Q

What feature of the spongy mesophyll is there?

A
  • full of air spaces
17
Q

What does the spongy mesophyll allow?

A
  • the spaces allow carbon dioxide to diffuse from the stomata through spongy mesophyll to the palisade cells.
  • oxygen diffusers from the palisade cells through spongy mesophyll to the stomata
18
Q

What other tissues are in the leaf?

A

The Xylem and the Phloem

19
Q

What does the xylem do?

A

Transports mineral ions. Includes magnesium which is used for chlorophyll.

20
Q

What does Phloem do?

A

Transports dissolved sugars produced by photosynthesis from the leaves to the rest of the plant.

Sugar is used for glucose in respiration

These sugars can be stored as starch

21
Q

What is the movement of sugars and other molecules through Phloem called?

A

Translocation

22
Q

What final tissue is there?

A

Meristem tissue

23
Q

Where is meristem tissue found?

A

Growing tips on shoots and roots

24
Q

What does meristem tissue contain?

A

Stem cells, though it can differentiate into different plant tissue