Organusms In Their Environment

Question 1

Physical facts that may affect organism as are:

Answer 1

Temperature
Availability of nutrients
Amount of light
Availability of water 
Availability of oxygen and carbon dioxide

Question 2

How does temperature affect organisms?

Answer 2

Temperature affects the rate Kg an organism’s metablolism
Some organisms cannot maintain a constant high body temperature
They cannot tolerate extreme temperatures
Organisms that can maintain a constant high body temperature may also struggle to survive in extreme temperatures

Question 3

How does availability of nutrients affect organisms?

Answer 3

Nutrients such as nitrates are essential for growth of plants and microorganisms
If there is a low concentration of these nutrients p, these organisms struggle to grow and survive

Question 4

How does the amount of light affect organisms?

Answer 4

Plants require light as an energy source for photosynthesis

In low light intensities plants will grow very slowly

Question 5

How does availability of water affect organisms?

Answer 5

All organism need require water
It is essential because chemical reactions that occur inside and outside cells occur in clout ions in water
In the absences of water, cells, and therefore organisms, die

Question 6

How does availability of oxygen affect organisms?

Answer 6

Oxygen is essential for aerobic respiration
It can become limited in the soil, so plant roots cannot grow and absorb mineral ions and water
It can also become limited in water, so aquatic organisms struggle to respire and survive

Question 7

How does availability of carbon dioxide affect organisms?

Answer 7

Carbon dioxide is essential for photosynthesis
This can become limited in an environment where there are many plants
This will reduce the rate of growth of plants