Biology STAAR Review

What is the complementary DNA strand for AGGTCA during replication?

• TCCAGT

• AGGTCA

• CCTAGT

• TGGACC

What is a change in an organism that allows it to survive in its environment?

• Adaptation

• Mutation

• Evolution

• Migration

What is DNA replication?

• The process of making a copy of DNA before cell division.

• The process of breaking down DNA into smaller fragments.

• The process of synthesizing proteins from RNA.

• The process of repairing damaged DNA strands.

How do lichens contribute to primary succession?

• Lichens begin to break down rock to form soil.

• Lichens provide shade for other plants to grow.

• Lichens absorb water from the atmosphere.

• Lichens produce seeds for new plants.

In which phase of the cell cycle is DNA replicated?

• G1 phase

• S phase

• G2 phase

• M phase

What is the function of lichens in an ecosystem?

• They help in soil formation and provide food for various organisms.

• They primarily decompose dead organic matter.

• They are a major source of oxygen in the atmosphere.

• They act as a barrier to prevent soil erosion.

What is the difference between variation and adaptation?

• Variation refers to differences within a species, while adaptation is a specific change that improves survival.

• Variation is the process of evolution, while adaptation is a type of mutation.

• Variation occurs only in plants, while adaptation occurs in animals.

• Variation is a change in environment, while adaptation is a change in behavior.

What are homologous structures?

• Anatomical features in different species that share a common ancestry.

• Structures that serve the same function in different species but have different evolutionary origins.

• Anatomical features that are identical in structure and function across different species.

• Random genetic mutations that occur in a species over time.

What is the name given to lichen or algae after a primary succession?

• Pioneer species

• Climax community

• Secondary species

• Transitional species

Define adaptation in biology.

• A trait that enhances an organism's ability to survive and reproduce in its environment.

• A process by which organisms become more similar to each other over time.

• A method of reproduction that involves two parents.

• A change in an organism's physical appearance due to environmental factors.