B4.1.2 Abiotic And Biotic Factors

Question 1

Biotic factors

Answer 1

Living factors of an ecosystem and the numbers of them

Question 2

Abiotic factors

Answer 2

Non living (physical) factors of an ecosystem

Question 3

Why is competition the most common biotic factor

Answer 3

Many organisms compete for factors such as food space and breeding partners

Question 4

Light intensity

Answer 4

Light is required for photosynthesis
In general, the higher the light availability, the greater the success of a plant
Plants evolve to grow successfully in different light intensities

Question 5

Temperature

Answer 5

Has the greatest effect on the enzymes that control metabolic reactions
Plants develop more rapidly in warmer temperatures as their metabolisms will be faster

Question 6

Moisture level

Answer 6

A lack of water causes most plants to wilt since water is required to keep their cells turgid, which keeps plants upright
Also required for photosynthesis

Question 7

Soil PH

Answer 7

Affects biological activity in soil and availability of certain minerals
Some plant species grow better in acidic soils
Others grow better in alkaline soils