Ecology

What is a community?

• Two or more populations in their environment

• Two or more populations of organisms

• All the organisms of the same or closely-related species in an area

Which of these are abiotic factors?

• Food and new pathogens

• Temperature and soil pH

• Light intensity and new predators

Which of these are biotic factors?

• Wind intensity and out-competition

• Dissolved oxygen and carbon dioxide levels

• Food and new predators

What do plants compete for?

• Light, water and minerals and mates

• Light, water and minerals and space

• Light, water and minerals and territory

Which of these is a behavioural adaptation in animals?

• Having sharp claws

• Production of venom

• Mating displays

What is interdependence?

• Humans depending upon other organisms for food

• All organisms in a food web depending upon each other

• No organisms in a food web depending upon each other

What is an ecosystem?

• Two or more populations of organisms in their environment

• All the organisms of the same or closely-related species

• Two or more populations of organisms

What type of traps catch small mammals?

• Pitfall traps

• Sweep nets

• Kick sampling

If you were investigating species richness what would you be counting in a quadrat?

• The number of different species

• The percentage of a quadrat covered by one species

• The number of times one species is present

What is the mode?

• The average value

• The middle number

• The most common number