Biology SOL Practice Test Review (with explanations)

Front

What role do fungi and bacteria play in ecosystems?

Back

Fungi and bacteria help decompose dead organisms, preventing the accumulation of dead matter on Earth.

Front

What evidence do similar limb structures in different organisms provide?

Back

They provide evidence of common ancestry, indicating that these organisms share a common evolutionary origin.

Front

What is the function of DNA polymerase during DNA replication?

Back

DNA polymerase 'proofreads' each new DNA strand to ensure accuracy in replication.

Front

What does it mean if a trait is recessive?

Back

A recessive trait, such as wrinkled seeds, only expresses itself when two copies of the recessive allele are present.

Front

In an experiment measuring the effect of exercise on cellular respiration, what is the dependent variable?

Back

The dependent variable is the amount of carbon dioxide produced by the students.

Front

What is the significance of comparing homologous structures in different species?

Back

It helps scientists understand evolutionary relationships and common ancestry among species.

Front

Define cellular respiration.

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits require two recessive alleles to be expressed.

Front

Explain the concept of natural selection.

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

Front

What is the role of producers in an ecosystem?

Back

Producers, such as plants, convert sunlight into energy through photosynthesis, forming the base of the food chain.