Biology STAAR Mock Exam

Front

What is the phenotype of a pea plant with the genotype Tt?

Back

tall

Front

Which statement is NOT part of the cell theory?

Back

Cells spontaneously appeared.

Front

What is the phenotype of a pea plant with the genotype PP?

Back

Purple flowers

Front

What type of organism eats dead stuff and does not give back to the soil?

Back

Detritivore

Front

What is a mutation?

Back

Random and irreversible changes in the DNA of an organism.

Front

What is the basic unit of structure and function in living organisms?

Back

The cell.

Front

What does it mean for a trait to be dominant?

Back

A dominant trait is expressed in the phenotype even if only one allele is present.

Front

What is the difference between a genotype and a phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the observable traits.

Front

What is a decomposer?

Back

An organism that breaks down dead organic material and recycles nutrients back into the ecosystem.

Front

What is natural selection?

Back

The process where organisms better adapted to their environment tend to survive and produce more offspring.