Biology- Topic 5

Question 1

Name 5 abiotic factors

Answer 1

Climate (temp, rainfall, humidity)
Oxygen availability 
Solar input
Edaphic factors (soil pH, soil moisture)
Topography (relief, slope angle, aspect)

Question 2

What is primary succession?

Answer 2

When succession develops from newly formed land e.g rocks, no organic material

Question 3

What is secondary succession?

Answer 3

When succession occurs in land where soil remains

Question 4

What develops first in a succession?

Answer 4

Pioneer plants, that can withstand harsh conditions

Question 5

What is the final stage of succession called

Answer 5

Climatic climax Community

Question 6

Two ways in which full succession can be prevented

Answer 6

Plagioclimax- human activities

Sub-climax- natural interventions e.g a river

Question 7

Ways in which global warming can affect organisms

Answer 7

Life cycles (metabolism, enzyme, temp)
Development (temp of hatching etc.)
Distribution (change conditions so have to move)

Question 8

How change in rainfall pattern affects organisms

Answer 8

Distribution change in water availability some may not be adapted to so move

Question 9

How climate change affects seasons which affects organisms

Answer 9

Timing changes

Change in development, life cycles, distribution

Question 10

Describe succession

Answer 10

Pioneer plants develop
Die, improve conditions
More species colonise
New species outcompetes previous species
New species better adapted
Previous species replaced 
Until reaches climatic climax community