Final Review of STAAR Biology Concepts

What is the primary contribution of crossing over during meiosis to genetic diversity?

• It prevents mutations.

• It increases the number of chromosomes.

• It ensures identical offspring.

• It contributes to genetic variety by exchanging genetic information.

What cellular process allows water to move from an area of high concentration to an area of low concentration?

• Diffusion of solutes

• Mitosis

• Osmosis

• Active transport

What causes the contractual vacuole of a unicellular organism to fill?

• Higher water concentration outside the cell

• Higher solute concentration inside the cell

• Higher water concentration inside the vacuole

• Active transport mechanisms

Which life form is crucial in the primary succession of a moraine for creating soil?

• Bushes

• Large trees

• Moss and lichens

• Insects

Why is taxonomic classification important in biology?

• It reduces the importance of genetic studies.

• It focuses only on the morphological differences.

• It simplifies the naming of new species.

• It helps in identifying evolutionary relationships.

What is the primary function of proteins in organisms?

• Storing energy

• Making enzymes to speed up reactions

• Providing structural support

• Storing genetic information

What impact does air pollution have on plants?

• Increases chlorophyll production

• No impact

• Decreases photosynthesis

• Enhances growth

What is the role of the ribosome in protein synthesis?

• It replicates DNA.

• It converts mRNA into amino acids.

• It synthesizes lipids.

• It stores RNA.

How do viruses replicate within a host cell?

• By undergoing mitosis

• By using the cell's metabolic processes

• By activating the host's immune response

• By producing their own energy

What demonstrates evolutionary relationships among organisms?

• Metabolic rate

• Cell size

• Number of chromosomes

• Homologous structures