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Flashcards in Chapter 1 living Things Deck (26):
1

Orgasnisms

Living things

2

Cell

Basic unit of structure and function in an organism

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Unicellular

Single celled organisms

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Multicellular

Organisms that are composed of many cells

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Metabolism

Combination of chemical reactions through which an organism builds up or breaks down materials

6

Stimulus

A change in an organisms surroundings that causes the organism to react

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Response

An organism reacts to a stimulus with an action or a change in behavior

8

Development

The process of change that occurs during an organisms life, producing a more complex organism

9

Asexual reproduction

Involves only one parent and produces offspring that are identical to the parent

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Sexual reproduction

Involves two parents and combines their genetic material to produce a new organism that differs from both parents

11

Spontaneous generation

The mistaken idea that living things can arise from no living sources

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Controlled experiment

A scientist carries out a series of tests that are identical in every respect except for one factor

13

Autotrophs

Organisms that make their own food

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Heterotrophs

Organisms that cannot make their own food

15

Homeostasis

Maintenance of stable internal conditions

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Classification

The process of grouping things based on their similarities

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Taxonomy

The scientific study of how organisms are classified

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Binomial nomenclature

Each organism was given a unique, two part scientific name

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Genus

A classification grouping that contains similar, closely realated organisms

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Species

A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce

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prokaryotes

Unicellular organisms whose cells lack a nucleus

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Nucleus

A dense area in a cell that contains nucleus acids the chemical instructions that direct the cells activities

23

Eukaryotes

Organisms with cells that contain nuclei

24

Branching tree diagram

Two groups of organisms with similar characteristics may be descended from a common ancestor

25

Shared derived characteristic

A trait such as fur that the common ancestor of a group had and passed on to its descendants

26

Convergent evolution

The process by which unrelated organisms evolve characteristics that are similar