L2 - The Enviroment

Question 1

Name the 6 main physical factors that can effect an organism

Answer 1

Radiation, temperature, moisture, salinity, current flow, soil structure

Question 2

Describe what endotherms and ectotherms are

Answer 2

Endotherm - produce their own body heat to regulate their temperature, therefore perform consistently.
Ectotherm - reply on external heat sources for heat (sun, other animals)

Question 3

Give a disadvantage for being both an endotherm or an Ectotherm

Answer 3

Endotherm - large energy expenditure therefore a large amount of fuel is needed
Ectotherm - extreme temperatures are fatal, and anything other than optimum temperature slows their performance

Question 4

Where are plants with the highest photosynthesis levels usually found?

Answer 4

In areas that don’t have any other limiting factors (such as nutrients, water)

Question 5

In terms of current flow, what happens to an animal if the speed is above the animals maximum movement speed?

Answer 5

The animal is moved unintentionally

Question 6

Name the 3 biotic factors that effect animals?

Answer 6

Prey/recourses, competition, ecological niche

Question 7

What are the 3 main things competition can influence?

Answer 7

Survival, growth, reproduction

Question 8

What occurs if 2 species niches overlap?

Answer 8

Interspecific competition