Mock Practice Questions Wrong

Question 1

State an alternative to using limewater to test for carbon dioxide,

Answer 1

Sodium hydrogen carbonate

Question 2

State what colour sodium hydrogen carbonate turns in
Less carbon dioxide
Moderate carbon dioxide
Increased carbon dioxide

Answer 2

Less= yellow
Moderate= red
Increased=purple

Question 3

explain how Inhalation occurs(4)

Answer 3

Intercostal muscles contract, moving the rib cage up and out
Diaphragm contracts and flattens
Volume inside the thorax increases
Thus Pressure decreases
So air is drawn in from high pressure gradient outside, to low pressure inside

Question 4

Give four factors that can cause low birth mass in a baby

Answer 4

-mother drinking alcohol or consuming drugs
-mothers own mass
-premature baby
-smoking/frequency of it

Question 5

The enzyme cellulase breaks down what into what

Answer 5

Cellulose into glucose

Question 6

What is a tertiary consumer

Answer 6

A consumer that eats a secondary consumer

Question 7

Give two reasons why plants do not absorb ALL the energy from the sun

Answer 7

1)not all wavelengths are absorbed, some are reflected
2)not all the light falls onto the leaves which contain the chlorophyll, eg some may fall onto the flowers instead

Question 8

What is a reflex response

Answer 8

An involuntary and automatic response to stimulus

Question 9

State three mineral ions and what their deficiencies look like in a plant

Answer 9

1)nitrates—-) stunted growth and yellowed leaves
2)potassium—) yellowed leaves with dead spots on them
3)phosphates—-) leaves turn purple

Question 10

2 substances that the phloem transports:

Answer 10

Sugars such as sucrose (not glucose)
Amino acids

Question 11

3 disadvantages of biological control

Answer 11

-takes longer to carry out
-can become pests themselves
-can’t kill entire population

Question 12

4 disadvantages of pesticide

Answer 12

-leads to pollution
-pests can develop resistance
-can kill other unintended organisms aswell(not specific)
-needs to be continuously applied

Question 13

All veins carry…. Blood except the

Answer 13

Deoxygenated blood
Pulmonary vein

Question 14

All arteries carry… blood, except the …

Answer 14

Oxygenated blood
Pulmonary artery

Question 15

Describe the movement of oxygenated blood, from when it enters the heart

Answer 15

Pulmonary vein
Left atrium
Left ventricle,
Leaves through aorta

Question 16

How is the nephron adapted for ultrafiltration of glucose molecules

Answer 16

Contain many mitochondria for energy in form atp for active transport