EmSAT EmSAT Biology 3

Question 1

What is natural selection?

Accepted Answer

The process where organisms with favorable traits survive and reproduce more successfully

Answer

Random changes in DNA

Answer

Artificial breeding of organisms

Answer

The extinction of all species

Question 2

What is a mutation?

Accepted Answer

A permanent change in DNA sequence

Answer

A change in gene expression

Answer

The normal copying of DNA

Answer

A type of cell division

Question 3

What is biodiversity?

Accepted Answer

The variety of life at genetic, species, and ecosystem levels

Answer

The number of species in a single habitat

Answer

The study of ecosystems

Answer

The rate of evolution

Question 4

What is an ecosystem?

Accepted Answer

A community of living organisms interacting with their non-living environment

Answer

A group of organisms of the same species

Answer

The total number of genes in a species

Answer

A single population of animals

Question 5

What is the difference between a food chain and a food web?

Accepted Answer

A food chain shows one linear pathway of energy; a food web shows multiple interconnected pathways

Answer

A food chain shows all connections; a food web shows one pathway

Answer

They are the same thing

Answer

A food web only includes plants

Question 6

What role do decomposers play in an ecosystem?

Accepted Answer

They break down dead organic matter and recycle nutrients

Answer

They produce energy from sunlight

Answer

They consume living animals

Answer

They fix nitrogen from the atmosphere only