B4///2

Question 1

What is epidermal tissue

Answer 1

Tissue which covers the plant

Question 2

What does palisade mesophyll contain

Answer 2

Lots of chloroplast

Question 3

What does palisade mesophyll do

Answer 3

traps light for photosynthesis

Question 4

What does spongy mesophyll have

Answer 4

Many stomata and large surface area

Question 5

Why does spongy mesophyll have a large surface area and many air spaces

Answer 5

To carry out diffusion of gases

Question 6

Give 3 examples of plant organs

Answer 6

Stems roots and leaves

Question 7

Practice labelling a leaf

Answer 7

Practice labelling a leaf

Question 8

What is translocation

Answer 8

Phloems carry sugars from the leaves to rest of plant

Question 9

What are stomata

Answer 9

Tiny holes in a leaf where gas diffuse in and out of

Question 10

What control stomata

Answer 10

Guard cells

Question 11

What is transpiration

Answer 11

when water evaporates from the cells in the leaf into the air spaces between them and then diffuses out of the plant through the stomata

Question 12

What are some factors affecting transpiration

Answer 12

Temperature
Humidity
Light intensity

Question 13

What does a magnesium deficiency do to a plant

Answer 13

Chlorosis- lack of chloroplast

Question 14

What colour is a plant lacking magnesium

Answer 14

Yellow leaves

Question 15

What does a nitrate deficiency do to a plant

Answer 15

Stunted growth as nitrates are needed for protein synthesis

Question 16

What happens to a cell with turgor pressure

Answer 16

Cell becomes rigid

Question 17

what is flaccid

Answer 17

when guard cells lose too much water so they close the stomata

Question 18

why are stomata on the bottom of the leaf and close during the night

Answer 18

it is more shaded on the bottom so is less likely to lose water and the guard cells are sensitive to light

Question 19

how can we investigate the effect of pH on amylase

Answer 19

place iodine into spotting wells and take 3 test tubes and add starch to the first, amylase to the second and pH buffer in the third. then place all test tubes into a water bath at 30 degrees for 10 mins and combine them with a stirring rod.