natural Flashcards

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1
Q

Adaptation

A

the act or process of changing to better suit a situation A body part or feature or a behavior that helps a living thing survive and function better in its environment. adaptation.

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2
Q

Species

A

In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity.

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3
Q

Evolution

A

In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. … Evolution relies on there being genetic variation? in a population which affects the physical characteristics (phenotype) of an organism.

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4
Q

Fossil

A

Fossils are the remains or traces of ancient life that have been preserved by natural processes, from spectacular skeletons to tiny sea shells. Imprints, tracks and trails can also become fossilised, like dinosaur footprints or worm burrows. These are called trace fossils.

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5
Q

Fossil Record

A

The fossil record helps paleontologists, archaeologists, and geologists place important events and species in the appropriate geologic era. It is based on the Law of Superposition which states that in undisturbed rock sequences the bottom layers are older than the top layers.

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6
Q

Trait

A

a distinguishing quality or characteristic, typically one belonging to a person.

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7
Q

Selective Breeding

A

Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. Humans have selectively bred plants and animals for thousands of years including: … ornamental plants with particular flower shapes and colours.

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8
Q

Natural Selection

A

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

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9
Q

Generation time

A

In population biology and demography, generation time is the average time between two consecutive generations in the lineages of a population. In human populations, generation time typically ranges from 22 to 33 years.

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10
Q

Speciation

A

Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages.

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11
Q

Relative Dating

A

Relative dating is the science of determining the relative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age (i.e. estimated age).

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12
Q

Absolute Dating

A

Absolute dating is the process of determining an age on a specified chronology in archaeology and geology. … Absolute dating provides a numerical age or range, in contrast with relative dating, which places events in order without any measure of the age between events.

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13
Q

Geologic Time Scale

A

The geologic time scale is the “calendar” for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration—eons, eras, periods, epochs, and ages.

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14
Q

Extinct

A

gone forever

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15
Q

Plate Tectonics

A

Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. … In plate tectonics, Earth’s outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates.

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16
Q

Primate

A

A primate is any mammal of the group that includes lemurs, lorises, tarsiers, monkeys, apes, and humans. The order Primates, with its 300 or more species, is the third most diverse order of mammals, after rodents and bats.

17
Q

Hominid

A

The Hominidae, whose members are known as great apes or hominids, are a taxonomic family of primates that includes eight extant species in four genera: Pongo; Gorilla; Pan; and Homo, of which only modern humans remain.

18
Q

Homo sapiens

A

Early modern human or anatomically modern human are terms used to distinguish Homo sapiens that are anatomically consistent with the range of phenotypes seen in contemporary humans from extinct archaic human species.