STAAR Practice DOK 3

Front

What is primary succession?

Back

Primary succession is the process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption or glacier retreat, leading to the establishment of a biological community.

Front

What is an example of a location where primary succession occurs?

Back

A sand dune formed in a desert or a coastal area.

Front

What is lactose?

Back

Lactose is a naturally occurring sugar found in milk.

Front

How can bacteria in yogurt benefit people who are lactose intolerant?

Back

The live bacteria in yogurt can help digest lactose, making it easier for lactose-intolerant individuals to consume dairy products.

Front

What is a dichotomous key?

Back

A dichotomous key is a tool used to identify organisms by answering a series of questions that lead to the correct name of the organism.

Front

Which phylum does a flatworm belong to?

Back

Platyhelminthes.

Front

What is Bacillus thuringiensis?

Back

Bacillus thuringiensis is a bacterium that produces protein crystals toxic to certain insects, used as a biological pesticide.

Front

How can Bacillus thuringiensis be applied in agriculture?

Back

By applying the bacteria to growing plants to control insect populations.

Front

What is the impact of non-native species on native species in an ecosystem?

Back

Non-native species can outcompete native species for resources, especially if they have no natural predators.

Front

What is an example of competition in an ecosystem?

Back

A native species and a non-native species competing for the same food source.