Unit 2 S2-S3 review for test

Front

What are mutations?

Back

Mutations are changes in the DNA sequence of an organism.

Front

What is combustion?

Back

Combustion is the process of burning.

Front

What is commensalism?

Back

Commensalism is a type of symbiotic relationship where one organism benefits while the other is neither helped nor harmed.

Front

What is natural selection?

Back

Natural selection is the process by which individuals better suited to their environment survive and reproduce more successfully.

Front

What happens to carbon dioxide levels if the plant population decreases?

Back

If the plant population decreases, the amount of carbon dioxide in the atmosphere would increase.

Front

Define DNA.

Back

DNA (deoxyribonucleic acid) is the molecule that carries the genetic instructions for life.

Front

What is the role of tRNA in protein synthesis?

Back

tRNA (transfer RNA) helps decode a messenger RNA (mRNA) sequence into a protein.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype is the observable characteristics.

Front

What is the significance of fossil fuels?

Back

Fossil fuels are natural substances formed from the remains of ancient organisms, used as a major energy source.

Front

What is extinction?

Back

Extinction is the end of an organism or a group of organisms, meaning no living members exist.