Population size

Question 1

Define population

Answer 1

a group of organisms of one species, living in the same area at the same time

Question 2

State the factors affecting the rate of population

growth for a population of an organism

Answer 2

• Competition
• Human/Animals: food, space, predation, diseases
• Plants: light, oxygen, carbon dioxide

Question 3

Lag phase

Answer 3

Increases slowly.

• Organisms start to adapt
• Doubling has little effect as numbers are so small

Question 4

Exponential

Answer 4

Increases rapidly

- No limiting factor

Question 5

Stationary

Answer 5

Remains constant

• Limiting factors because of competition
• Build up of toxic waste

Question 6

Death

Answer 6

Decreases

- Death rates > birth rates