L5 - Water, Air and Gas

Question 1

Give 3 examples of types animals that are sensitive to moisture loss

Answer 1

Amphibians, Isopods, Nematodes and earthworms

Question 2

What is the shape of the graph for moisture against temperature?

Answer 2

exponential

Question 3

Describe the relationship to amount of moisture in the air to temperature

Answer 3

The warmer the temperature, exponentially increases the amount of water that can be held in the air

Question 4

Name the 4 types of adaptation organisms have gained to reduce water loss, and give an example for each

Answer 4

Morphological
Physiological
Biochemical
Behavioural - active only at certain times of say

Question 5

Give 3 things that effect water uptake in plants

Answer 5

Pore size, osmolite concentration of the soil, dryness of the soil

Question 6

What organisms would a change in soil pH effect?

Answer 6

Earth worms, diatoms (phytoplankton) is affected by water pH

Question 7

What is the gas composition of the atmosphere?

Answer 7

21% Oxygen
78% Nitrogen
0.04% CO2

Question 8

Is CO2 or O2 more likely to be a limiting factor? What factors can effect both?

Answer 8

O2. Temperature and turbulence

Question 9

How well does O2 dissolve in water?

Answer 9

O2 solubility in water is low

Question 10

What 2 ways do aquatic animals uptake water?

Answer 10

1) maintaining a continuous flow of water over their respiratory surfaces
2) have a low SA:V

Question 11

In organisms that live in soil, what is the role having a thin film of water?

Answer 11

Having a thin film of water allows O2 o diffuse and is required for water balance. A thick film of water can cause anaerobic conditions.

Question 12

What kind of plants are adapted to water loss through stomata?

Answer 12

C4