Yr 11 Biology - Pre Test Module 4

Which of the following would be the two most important abiotic factors determining the abundance and distribution of Australian organisms?

• Predators and food source

• Temperature and rainfall

• Humidity and soil fertility

• Water availability and introduced species

All interactions of a species with the other members of its community and their interactions with all abiotic factors in the environment is called:

• a community

• an ecosystem

• an ecological niche

• a trophic relationship

Feeding relationship where the predator obtains its food by killing or eating another animal is called:

• predation

• commensalism

• mutualism

• competition

When two or more organisms use one or more resources in common this is called:

• predation

• competition

• commensalism

• allelopathy

When a relationship between two species results in one that benefits and the other is not harmed, this is called:

• parasitism

• commensalism

• mutualism

• allelopathy

What technique/s can be used to estimate the populations of plants in a specific area

• Transect

• Quadrat

• Capture-mark-recapture

• Tagging/marking

What technique/s can be used to estimate the populations of animals in a specific area

• Transect

• Quadrat

• Capture-mark-recapture

• Tagging/marking

When scientists say that a species has gone 'extinct' they mean:

• the species has gone forever

• the species is endangered

• the species has not been seen for some time

• the species abundance has dramatically declined

Since settlement of Australia by Europeans in 1788, 30 species of mammals and birds and about 100 species of plants have become extinct. Which of the following are the biotic factors most likely to have caused these extinctions?

• changes in rainfall

• competition from introduced species

• deforestation

• changes in temperature

Which of the following is considered a recent Australian extinction event?

• Dinosaurs

• megafauna

• trilobites

• mammoths