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living things are

organisms

1

the basic unit of structure and function in an organism

cell

2

they are single-celled organisms, like bacteria

unicellular organisms

3

they are organisms that are composed of many cells

multicellular organisms

4

The cells of living things are made of chemicals

The Chemicals of Life

5

Organisms get ________ from taking in and breaking down materials

energy

6

this is the combination of chemical reactions through which an organism builds up or breaks down materials

metabolism

7

The cells of organisms use _______to do what living things must do, such as ______ and _______ injured parts

energy, grow, repair

8

A change in an organism's surroundings that causes the organism to react

stimulus

9

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

response

10

the process of becoming larger

Growth

11

this is the process of change that occurs during an organism's life, producing a more complex organism

Development

12

this involves only one parent and produces offspring that are identical to the parent

Asexual reproduction

13

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

Sexual reproduction

14

living things arise from other living things through ____________

reproduction

15

the mistaken idea that living things can arise from nonliving sources is called

spontaneous generation

16

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

controlled experiment

17

organisms need a source of energy to live, they use __________ as their energy source

food

18

organisms that make their own food are called

autotrophs

19

organisms that cannot make their own food are called

heterotrophs

20

organisms need ________ to obtain chemicals from their surroundings, break down food, grow, move substances within their bodies, and reproduce

water

21

a place to get food and water and find shelter

living space

22

organisms must be able to keep the conditions inside their bodies stable, even when conditions in their surroundings change significantly

stable internal conditions

23

the maintenance of stable internal conditions is called

homeostasis

24

this is the process of grouping things based on their similarities

classification

25

Biologists use ________________ to organize living things into groups so that the organisms are easier to study

classification

26

the scientific study of how organisms are classified is called

taxonomy

27

each organism was given a two parted name . this system is called

binomial nomenclature

28

the first word in an organisms scientific name is its

Genus

29

a __________ is a classification grouping that contains similar, closely related organisms

Genus