Lesson 4B: Characteristics of Life

Question 1

all living organisms share several key characteristics or functions

Answer 1

order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing

Question 2

when viewed together, these characteristics serve to

Answer 2

define life

Question 3

characteristics of life inclue

Answer 3

cells, homeostasis, reproduction, metabolism, dna/heredity

Question 4

in order to be considered living, an organism must be made o

Answer 4

one or more cells

Question 5

three main ideas when it comes to ells

Answer 5

1. cells are the basic unit of all life
2. all living things are made from one or more cells
3. all cells come from existing cells

Question 6

this means that cells are the smallest things that can be considered living

Answer 6

cells are the basic unit of life

Question 7

this means that cells and other livings things don’t just appear out of nowhere. they have come from other cells

Answer 7

all cells come from existing cells

Question 8

the basic units of life of every living organism

Answer 8

cells

Question 9

types of organisms

Answer 9

unicellular and multicellular

Question 10

organisms that are made up of just one cell

Answer 10

unicellular

Question 11

organisms that are made up of many cells with each cell having specific functions

Answer 11

multicellular

Question 12

any self-regulating process by which an organism tends to maintain stability while adjusting to conditions that are best for its survival

Answer 12

homeostasis

Question 13

if homeostasis is successful

Answer 13

life continues

Question 14

if homeostasis is unsuccessful

Answer 14

results in disaster or death of an organism

Question 15

responsible for key homeostatic processes

Answer 15

hormones

Question 16

examples of key homeostatic processes

Answer 16

control of blood glucose levels and blood pressure

Question 17

regulation of the internal conditions within cells and whole organisms such as temperature, water, and sugar levels

Answer 17

homeostasis

Question 18

the body maintains homeostasis by

Answer 18

controlling a host of variable

Question 19

examples of variables (homeostasis)

Answer 19

body temperature, blood ph, blood glucose levels, fluid balance, sodium, calcium ion concentrations

Question 20

mechanism that maintains a stable internal environment despite the changes present in the external environment

Answer 20

homestasis

Question 21

the ability to form a new offspring

Answer 21

reproduction

Question 22

types of reproduction

Answer 22

sexual and asexual

Question 23

2 organisms combining genetic material for new offspring

Answer 23

sexual reproduction

Question 24

1 individual providing exact copy of genetic material

Answer 24

asexual reproduction

Question 25

generates offspring that are genetically identical to a single parent

Answer 25

asexual reproduction

Question 26

two parents contribute genetic information to produce unique offspring

Answer 26

sexual reproduction

Question 27

the chemical reactions in the body’s cell that change food into energy

Answer 27

metabolism

Question 28

specific proteins in the body control the

Answer 28

chemical reactions of metabolism

Question 29

refers to the whole sum o reactions that occur throughout the body within each cell and that provide the body with energy

Answer 29

metabolism

Question 30

the energy the body gets from metabolism is used or

Answer 30

vital processes and the synthesis of new organic material

Question 31

balancing act involving two kinds of activities that go on at the same time

Answer 31

metabolism

Question 32

activities in metabolism

Answer 32

anabolism and catabolism

Question 33

building up body tissues and energy stores

Answer 33

anabolism

Question 34

breaking down body tissues and energy stores to get more fuel for body functions

Answer 34

catabolism

Question 35

the breakdown of food components into their simpler forms, which can then be used to provide energy and the basic building blocks needed for growth and repair

Answer 35

catabolism

Question 36

examples of food components broken down in catabolism

Answer 36

carbohydrates, protein, and dietary fats

Question 37

the part of metabolism in which our body is built or repaired

Answer 37

anabolism

Question 38

all living organisms store hereditary information in the form of

Answer 38

nucleic acid molecules

Question 39

types of nucleic acid molecules

Answer 39

DNA or RNA

Question 40

molecule that is stored in a cell and contains the genetic blueprint to make an entire new organism

Answer 40

DNA

Question 41

DNA stands for

Answer 41

deoxyribonucleic acid

Question 42

all living things have ___ within their cells

Answer 42

DNA

Question 43

nearly every cell in a multicellular organism possesses

Answer 43

the full set of dna required for that organism

Question 44

specify the structure and function of living things

Answer 44

dna

Question 45

other purpose of DNA

Answer 45

serves as the primary unit of heredity in organisms of all types

Question 46

the process that copies dna

Answer 46

replication

Question 47

involves the production of identical helices of dna from one double-stranded molecule of dna

Answer 47

replication

Question 48

vital to dna replication

Answer 48

enzymes

Question 49

why are enzymes vital to dna repliation

Answer 49

they catalyze very important steps in the process