Unit 3 Senior Biology: Data test revision

Scientists describe biodiversity as:

• all of the endangered species from a particular part of the world.

• the variety of life on Earth.

• the study of living systems and how diverse they are.

• the study of cellular processes and how they vary.

Which of the following is NOT a measure of biodiversity?

• Percentage present

• Relative species abundance

• Species richness

• Percentage cover

According to the biological species concept, a species consists of:

• individuals that can and do interbreed and are reproductively isolated.

• individuals that form from the smallest cluster within a particular environment.

• individuals which are capable of breeding if they are put together artificially.

• individuals that have the same DNA and therefore behave alike.

Abiotic factors influence the ability of an organism to survive in a particular environment. An example of an abiotic factor is:

• the number of predators present during the day.

• the number of predators present during the night.

• the annual amount of rainfall.

• the total number of animals living in the environment.

Coral polyps are tiny sea anemones that build reefs with the help of photosynthetic algae in their tissues. The corals feed on tiny animals and, in turn, the reef is fed upon by starfish, parrot fish and sea urchins. These parrot fish may become prey of small sharks. Snails, many shellfish and sea slugs feed on algae. Coral reefs only occur in shallow waters at temperatures above 20°C. From this information it can be concluded that the coral polyps, parrot fish, small sharks, sea slugs, snails, shellfish algae, starfish and sea urchins:

• form a single population that inhabits the reef ecosystem.

• together with the physical environment, form the reef ecosystem.

• together with the sunlight, form a tightly linked food web.

• are termed abiotic factors, because they are living organisms within an ecosystem.

Bees pollinating flowers is an example of:

• Competition.

• Symbiosis.

• Predation.

• Disease.

Cladistics is the method of choice for classifying life. Which of the following best describes the term used?

• A character matrix is a table that lists the characteristics of organisms. It is used to construct cladograms.

• A cladogram is a diagram depicting taxonomic relationships among organisms based on overall similarity of many characteristics without regard to evolutionary history.

• A clade is a taxonomic group that contains most of the descendants of a common ancestor.

• Cladistics is a method of classifying organisms based on all the characteristics they have in common.

The current system of naming a species uses which of the following two levels of classification?

• Phylum and class

• Order and class

• Genus and family

• Genus and species

A popular system used by scientists is to classify organisms into five kingdoms. This is based on the nature of the organism’s:

• nutrition

• cells

• reproduction

• environment

The kingdom of the eukaryotes not classified as plants, animals or fungi is known as:

• fungi

• protista

• plantae

• archaea