science 8

Question 1

what are pedigree charts?

Answer 1

Pedigree charts are used to to see the generations of you family linked an family tree and also it shows if any disease’s were passed down the generations.

Question 2

what is selective breeding?

Answer 2

selective breeding is when people take 2 organisms and breed them bye choice they don’t naturally bread.

Question 3

what is gene engineering?

Answer 3

gene engineering is used to alter the Dna of organisms.

Question 4

what are evolution’s( natural selections,species,adaptation,variation,
extinction,fossil

Answer 4

evolution-physical change in a species over time.
Example: human brain size increased over time

extinction-death of a species because it can not
adapt to the changing environment.

natural selection-nature “picks” who
continues on and who doesn’t (extinction)

species-individual → living children that can reproduce

fossils are animals that have died and their shapes and bones have been petrified in to the ground.

adaptations are a trait (feature) that helps an
individual survive and reproduce; very
helpful variation.

variation differences between individuals
of the same species.