EMERY SCIENCE REVIEW

A change in structure or habits (behavior), often hereditary, by which an organism improves its condition

• adaptation

• population

• species

• variation

making deliberate crosses of plants or mating of animals, so the offspring will have a desired characteristic.

• natural selection

• physiology

• selective breeding

• variation

process by which gene frequencies in a population change through certain individuals producing more offspring than others.

• natural selection

• adaptation

• dichotomous key

• population

a tool used to identify species of organisms using opposing observable characteristics

• dichotomous key

• species

• variation

• adaptations

a different form or version of something

• variation

• species

• adaptation

• physiology

a way in which a living organism or bodily part functions

• physiology

• species

• natural selction

• adaptation

a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding

• species

• variation

• selective breeding

• adaptation

all members of a species living in a particular area at a particular time.

• population

• species

• variation

• adaptation

Which of the following are external adaptations (choose two)

• xylem in plants to transport water and provide support

• a bird's hollow bones make it easier to fly

• a duck's webbed feet helping them move through water

• a polar bear having two layers of fur to prevent heat loss

• a human's ability to talk in order to communicate

Which of the following are internal adaptations? Select all that apply

• gills in fish allowing them to breath underwater

• hollow bones in a bird allowing them to fly

• xylem in plants that transports water and provides support

• grizzly bears having sharp teeth for hunting

• giraffes having long necks to reach tall trees