Organisms and their environment

Question 1

Food chain

Answer 1

series of organisms which energy and nutrients are transferred in the form of food

Question 2

Bioaccumulation

Answer 2

accumulation of non-biodegradable chemicals overtime which cannot be excreted in fatty tissues of organism

Question 3

Energy may be lost to the environment by..

Answer 3

undigested matter everted by consumers
Metabolic waste excreted by consumers
Heat during respiration
Uneaten body part (bones)

Question 4

Decomposers

Answer 4

feed on decaying organic matter. Respire aerobically to release CO2

Question 5

Reasons for conservation

Answer 5

Prevent extinction
Maintain large genetic pool - change in environment less likely to wipe out whole species

Question 6

Producers

Answer 6

organisms that can make their own food by photosynthesis. Producers contain chlorophyll which traps and converts light energy to chemical energy

Question 7

Insecticide

Answer 7

non biodegradable, cannot be excreted, stored in fatty tissues, passed along food chains, conc increases along trophic lvl, results in bio magnification

Question 8

Trophic level

Answer 8

feeding position of an animal in a food chain

Question 9

Undesirable affects for deforestation

Answer 9

Loss of biodiversity
Global warming

Question 10

Importance of carbon cycle

Answer 10

Ensure continuous supply of CO2 for photosynthesis. Photosynthesis coverts light energy into chemical energy in food.
Enables energy flow through ecosystem. Carbons compounds carry the trapped solar energy from one organism to another

Question 11

Consumers

Answer 11

organisms that are not able to make their own food. They obtain energy by feeding on other organisms

Question 12

Carbon sinks

Answer 12

Stores carbon compounds for long period of time
Store more carbon than it releases

Question 13

Biomagnification

Answer 13

increasing conc of certain chemicals in each exceeding trophic level. Passed along food chain. Become concentrated in the bodies of the final consumers