Topic 4.1 - Species, communities, and ecosystems

Question 1

Species

Answer 1

Groups of organisms that can reproduce to make fertile offspring.

Question 2

Community

Answer 2

Formed by populations of different species living together and interacting with each other.

Question 3

Heterotrophs

Answer 3

Obtaining carbon compounds from other organisms.

Question 4

Saprotrophs

Answer 4

Heterotrophs that obtain organic nutrients from dead organic matter by external digestion.

Question 5

Autotrophs

Answer 5

Creating their own carbon compounds from carbon dioxide and other simple substances.

Question 6

Chemoautotrophs

Answer 6

Creating their own carbon compounds from inorganic chemical substances

Question 7

Detritivores

Answer 7

Heterotrophs that obtain organic nutrients from detritus by internal digestion.

Question 8

Consumers

Answer 8

Heterotrophs that feed on living organisms by ingestion.

Question 9

Producers

Answer 9

An autotroph

Question 10

Population

Answer 10

Group of organisms of the same species living in the same area at the same time.

Question 11

Separated populations

Answer 11

Different populations of the same species may eventually develop new characteristics (evolve) and may either still be able to interbreed or e

Question 12

Reproductive isolation

Answer 12

Two populations of different species being unlikely to interbreed

Question 13

Photoautotrophs

Answer 13

Creating their carbon compounds from carbon dioxide and sunlight.

Question 14

Nutrient cycling

Answer 14

The supply of inorganic nutrients is supplied by nutrient cycling.

Question 15

Ecosystems

Answer 15

Formed by the interactions between a community and its abiotic environment.

Question 16

Sustainability of ecosystems

Answer 16

Ecosystems have the potential to be sustainable for a long time and the sustainability is determined by 3 factors:
• nutrient availability
• energy availability
• detoxification of waste material