science 7 2nd Flashcards

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1
Q

adaption

A

a charichteristic that improve an individuals ability to survive and reproduce in a particular in a specific envierment

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2
Q

species

A

a group of organisms that are closely related and can mate to produce fertile offspring

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3
Q

Evolution

A

this procces in which inheareted characteristics within a population change over generations such that new species sometimes arise

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4
Q

Fossil

A

The remains or physical evidence of an organism preserved by geological process

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5
Q

Fossil records

A

A historical sequence of life indicated by fossils found in layers of the Earth’s crust

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6
Q

Trait

A

Genetically determined characteristic

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7
Q

Selective breeding

A

The human practice of breeding animals or plants that have a certain desired characteristic

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8
Q

Natural selection

A

The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do a theory to explain the mechanism of evolution

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9
Q

Generation time

A

A period between the birth of one generation and the birth of the Next Generation

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10
Q

Speciation

A

The formation of a new species as a result of evolution

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11
Q

Relative dating

A

Any method of determining weather and event or object is older or younger than your other events or objects

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12
Q

Absolute dating

A

any method of measuring the age of an object or event in years

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13
Q

Geologic time scale

A

Standard method used to divide the Earth’s long natural history into manageable Parts

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14
Q

Extinct

A

Scribes a species that has died out completely

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15
Q

Plate tectonics

A

The theory that explains how large pieces of the Earth outermost layer called tectonic plates move and change shape

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16
Q

Primate

A

Of mammal characterized by opposable thumbs and binocular vision

17
Q

Hominand

A

Of primate characterized by biodependence relatively long lower limbs and the back of a tail

18
Q

Homo sapiens

A

The species of hominins that includes modern humans and their closest ancestors that first appeared about $100,000 to 160,000 years ago