B2 - Plant Cells

Question 1

Where is the leaf is the stomata found

Answer 1

Lower epidermis

Question 2

What is the meristem tissue and where is it found

Answer 2

Found at the very tips of the roots and shoots of plants, made up off plant stem cells that differentiate into whatever the plant needs

Question 3

What 2 leaf structures help minimise water loss

Answer 3

Waxy cuticle which is impermeable to water

Guard cells which can close stomata

Question 4

What is an advantage of the upper epidermis

Answer 4

The upper epidermis is transparent To allow light to pass though and reach the palisade mesophyll cells, which is where photosynthesis happens

Question 5

Is the leaf an organ or tissue

Answer 5

The leaf is an organ

Question 6

Name one advantage of the the spongy mesophyll layer

Answer 6

The spongy mesophyll layer contains so many air gaps to allow carbon dioxide to fissure from the stomata to the palisade mesophyll cells

Question 7

How does the level of water in the plant affect the opening and closing of stomata

Answer 7

When there is plenty of water in the plant, the guard cells become turgid, which opens the stomata to allow photosynthesis by letting in CO2

When there us not very much water in the plant, the guard cells become flaccid, which closes the stomata to mantain the water vapour inside the plant.

Question 8

What is the waxy cuticle

Answer 8

A thin part of the cell that impermeable to water and is a layer of lipids

Question 9

What are the stomata between

Answer 9

2 guard cells

Question 10

What name is given to the lower epidermis, bottom of the plant openings that allow carbon dioxide into the plant

Answer 10

Stomata