Unit 7 Study Guide

Variation

• A specific characteristic that an organism can pass to its offspring.

• A trait that increases on an organism, can pass to its offspring.

• When an organism cannot pass its genes and or DNA to its offspring.

• Any difference between individuals of the same species.

Endangered

• A species close to becoming endangered.

• A species who is close to evolving into a new species.

• A species close to becoming extinct.

• A species who no longer exists on earth.

The definition of fitness:being phyiscally active and working out

• True

• False

Embryo is:

• An early stage in development,or unborn.

• A basic unit of heredity passed from a parent to a child

• An organisms ability to survive and reproduce.

• The process of changing over time.

What is evolution?

• When organisms reproduce within one another.

• When organisms create new species within the span of a year.

• The process of changing over time.

Structures that have different matter forms but develop from the same embryonic (unborn) tissues:

Ex. wing of bat, human arm, leg of a turtle

• Homologous Structures

• Vestigial

  Structures

• Genetic

  Variation

• Artificial

  Selection

What is an example of artificial selection?

• Letting dogs choose their own mate

• Letting plants pollinate on their own

• Crossing a labrador and a poodle to create a labradoodle

Differences in traits are called:

• natural selection

• genetic variations

• artificial selection

• adaptations

Natural selection occurs during the lifetime of a single organism.

• True

• False

TRUE or FALSE: Natural selection will still occur if each individual has the same exact traits

• TRUE

• FALSE