evolution and natural selection (10)

Question 1

define the term evolution

Answer 1

Evolution is the process by which living things change over time. It happens as species adapt to their environment, leading to new traits and sometimes new species.

Question 2

define the term gene pool

Answer 2

A gene pool is the complete set of genes in a group of living things. It includes all the different versions of genes that can be passed to their offspring. A larger gene pool offers more variety, which helps the group adapt to changes in the environment.

Question 3

how can a gene pool change over time

Answer 3

A gene pool changes over time as helpful traits are passed on, mutations add new genes, and mixing with other groups introduces different genes. Random events can also affect gene frequencies.

Question 4

what is mutation

Answer 4

A mutation is a change in an organism’s DNA. It can happen by accident and can create new traits. Some mutations are helpful, while others might not be.

Question 5

what is environmental selection pressures

Answer 5

Environmental selection pressures are factors in the environment that affect which traits are better for survival. Things like food availability, climate, and predators can make it easier or harder for certain animals or plants to live and reproduce.

Question 6

what is natural selection

Answer 6

Natural selection is the process where the best-adapted animals or plants survive and reproduce. This helps pass on their helpful traits to the next generation.

Question 7

What is the only way new genetic instructions can be made?

Answer 7

mutations in dna.