Unit 3.1 Ecosystems

Question 1

Ecosystem

Answer 1

All the organisms (community) living in a particular habitat + the non living components with which they interact.

Question 2

Population

Answer 2

All the individuals of the same species living in an ecosystem.

Question 3

Interspecific competition

Answer 3

Competition between members of different species for similar resources.

Less intense than intraspecific competition.

Question 4

Intraspecific competition

Answer 4

Intense competition between members of the same species for the same resources.

Question 5

Species

Answer 5

A group of genetically similar organisms with common characteristics that are able to interbreed to produce fertile offspring.

Question 6

Biodiversity

Answer 6

The number of different species that exist in an area.

Question 7

Community

Answer 7

All the organisms of all species living in an ecosystem.

Question 8

Habitat

Answer 8

The place where an organism lives.

Question 9

Predation

Answer 9

One organism (predator) eats another (prey) to obtain food.

Question 10

Niche

Answer 10

The role of an organism in a community.

Question 11

Producers

Answer 11

Produce their own food molecules using photosynthesis.

Plants are the producers in an ecosystem.

Question 12

Herbivores (primary consumers)

Answer 12

Animals which feed on plants to obtain food molecules.

Question 13

Secondary consumers

Answer 13

Eat other animals to obtain food molecules.

Could be carnivores (eat other animals) or omnivores (eat both plants and animals)

Question 14

Food chain

Answer 14

Shows feeding relationships within a food web. Arrows represent energy flow.

Question 15

Food web

Answer 15

Shows feeding relationships within a community.

Made of many inter-linked food chains.