Ch 1: Biology in the 21st Century Pt. 1 

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60 Terms

1

Scientists

________ use observations and data to form hypotheses.

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2

Evolution

________ can occur through natural selection and adaptation.

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3

Scientific Inquiry

________ is based on curiosity and skepticism, and also requires evidence.

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4

Science

________ is a human process of trying to understand the world around us.

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5

Constants

The conditions in the experiment that dont change.

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6

Negative feedback

causes a response that should return the system to its original state when a change in a system occurs.

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7

Natural Selection

when organisms with a certain genetic trait survive and reproduce better than organisms without the trait.

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8

Parts of living things

________ are structured to work in a way that is most beneficial.

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9

dependent variables

Experiments: a process where scientists study factors (independent and ________) to find cause- and- effect relationships.

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10

Homeostasis

The maintenance of constant internal conditions in an organism.

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11

Adaptations

________ occur through MANY generations as traits are passed down.

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12

Theory

a proposed explanation for observations and results supported by evidence.

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13

Skepticism

uses critical thinking to analyze results.

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14

Metabolism

All of the chemical processes that build up or break down materials.

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15

Peer Review

________ is when results are evaluated by other scientists.

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16

Observation

using senses and tools to study the world.

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17

Biology

The scientific study of all forms of life.

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18

DNA

The genetic material found in all organisms.

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19

Organisms

________ pass down genetic material when they reproduce.

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20

Biosphere

All living things and all the places they are found on earth.

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21

chemical energy

Living things use ________ to survive.

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22

Ecosystem

A physical environment with different species that interact with other species and nonliving things.

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23

Hypothesis

A proposed answer for a scientific question.

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24

Quantitative data

can be measured or counted to report how something happens.

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25

Physical reactions

________ called stimuli include light, temperature, and touch.

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26

System

An organized group of related parts that form a whole.

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27

traits

Shared ________ in organisms are a result of common evolutionary descent.

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28

Biodiversity

The variety of life across the biosphere.

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29

Greater biodiversity

________ is found near the equator because more living things can live in warmer climates than in cold climates.

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30

independent variable

This is what is measured and observed during an experiment to see the impacts of the ________.

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31

Multicellular organisms

________ reproduce from two parents.

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32

Adaptation

An inherited trait that gives an advantage to organisms with that trait.

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33

Evolution

The change of genetic material in living things over time.

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34

Natural selection

________ can lead to the evolution of new species.

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35

Homeostasis

________ is usually maintained with Negative feedback.

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36

Observation

________ is important for categorizing and studying organisms.

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37

Organisms

________ develop according to instructions carried by DNA and RNA.

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38

Chemical energy

________ is received through absorbing sunlight or eating other organisms.

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39

Independent variable

A factor that is changed in an experiment.

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40

Biosphere

All living things and all the places they are found on earth

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41

Biodiversity

The variety of life across the biosphere

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42

Species

A type of living thing that can reproduce by breeding among themselves

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43

Biology

The scientific study of all forms of life

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44

Organism

Any individual living thing

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45

Cells

The basic unit of life

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46

Metabolism

All of the chemical processes that build up or break down materials

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47

DNA

The genetic material found in all organisms

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48

System

An organized group of related parts that form a whole

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49

Ecosystem

A physical environment with different species that interact with other species and nonliving things

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50

Homeostasis

The maintenance of constant internal conditions in an organism

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51

Evolution

The change of genetic material in living things over time

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52

Adaptation

An inherited trait that gives an advantage to organisms with that trait

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53

Observation

using senses and tools to study the world

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54

Data

Information that is collected through observation

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55

Hypothesis

A proposed answer for a scientific question

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56

Experiments

a process where scientists study factors (independent and dependent variables) to find cause-and-effect relationships

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57

Independent variable

A factor that is changed in an experiment

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58

Dependent variable

A factor that changes based on the independent variable

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59

Constants

The conditions in the experiment that dont change

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60

Theory

a proposed explanation for observations and results supported by evidence

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