which best explains the importance of understanding science

it allows us to be educated in issues important in todays world

which is not a topic of biology

the distribution of sand on an ocean floor

if cancer is present what is the likely explanation for what happened to the cells depicted in the curves B and D

they died off because the cancerous cells deprived them of nutrients

which of the following does not occur as a cell grows larger and larger in size

ration of surface area to volume increases

which of the following is the most significant result of technology

increased population growth, creating the need for additional food

the cytosol and all of a cells organelles except the nucleus

living things do all of the following except

pass an identical genetic code to their offspring for many generations

consider the energy for a chemical reaction, overall is energy released or absorbed

released, the energy level of the reactants is greater than the products

a cell theory states all of the following except

all cells have an outer rigid cell wall

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biology semester test

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Questions 97

Answers

1
which might you study in a biology course
communication over fiber optics
communication across telephone wires
communication by satelite
communication among birds
2
__ are the power houses of a cell
vesicles
lysosomes
ribosomes
mitochondria
3
which of the following occurs in telophase
chromosomes line up
chromosomes condense
chromosome relax
chromosomes move to opposite poles
4
which of these examples shows a response to a stimulus
dog laying down
fish scales
rabbit running in the rain
bird
5
researcher measure plant h&w at the end of the experiment what is missing in the experimental design
a control
a dependent variable
independent variable
a constant
6
which best explains the importance of understanding science
it allows us to understand different ways of measuring things
it allows us to be educated in issues important in todays world
it allows us to perform experiments on a variety of living things
it allows us to determine which endangered species are worth saving
7
two substances are combined & heat is produced, does this provide that a chemical reaction took place?
no, this would be a physical change
no, heat is no a chemical
yes, energy is absorbed
yes, energy is released
8
what represent a formula for a chemical compound
H
C
P
H2O
9
proteins are made on
vesicles
nucleoli
robosomes
nuclei
10
why is the synthesis states called this
it combines several smaller stages into one
the chromosomes come together
protein synthesis is taking place
DNA synthesis is taking place
11
all living things are made up of one or more cells
false
true
12
a molecule of water has which bonds
1 ionic bond
2 covalent bonds
2 ionic bonds
1 covalent bond
13
the rough endoplasmic reticulum has no bound ribosomes
true
false
14
which of the atoms pictured is most likely to form an ion
O
Na
all of the above
C
15
who was the first person to use the term cell
robert hooke
anton van leeuwenhoek
theodor schwaan
charles darwin
16
sugars and starches are
A and B
lipids
macromolecules
carbohydrates
17
all cells are surrounded by a cell membrane
false
true
18
the __ of a plant cell exerts pressure outward, providing internal support to the cell
nucleus
cell wall
plastid
central vacuole
19
which is not a topic of biology
the speed at which a hummingbird flies
the chemicals at work in the stomach
the relationship between fungi and trees
the distribution of sand on an ocean floor
20
which is an example of a chemical reaction
sugar dissolving in water
ice melting
water evaporating
iron rusting
21
ribosomal RNA is made within the
rough endoplasmic reticulum
cytoplasm
nucleoli
lysosomes
22
if cancer is present what is the likely explanation for what happened to the cells depicted in the curves B and D
they died off because the cancerous cells deprived them of nutrients
they thrived with the cancerous cells
they died off ude to natureal causes
they were harmed by radiation therapy
23
one isotope of carbon differs from another in which way
number of neutrons
number of protons
atomic number
number of electrons
24
amino acids are building blocks of
proteins
carbohydrates
nucleic acids
fats
25
the plasma membrane is composed of two layers of
phospholipids
cellulose
endoplasmic reticuli
dna
26
an atom of fluorine has 9 electrons. its second energy level has
eight electrons
2 electrons
nine electrons
seven electrons
27
the __ of a eukaryotic cell is made up of two bilayer membranes that regulate the molecules entering the nucleus
nucleolus
nuclearn envelope
plasma membrane
cytoskeleton
28
__ are the essential components of nearly all structures and chemical reactions of a cell
proteins
lysosomes
nucleic acids
ribosomes
29
the first person who concluded that all plants were made up of cells was
rudolf virchow
matthias scleidan
theodor schwaan
charles darwin
30
what time period will provide the most flowering plants
6-7 days
8-9 days
5-6 days
7-8 days
31
proteins and carbohydrates can float around in the plasma membrane
false
true
32
which of the following does not occur as a cell grows larger and larger in size
difficulty obtaining nutrients
diffusion across the cell membrane is impaired
ration of surface area to volume increases
difficulty eliminating wastes
33
large, organic molecules that are made of many smaller unites are called
complex molecules
macromolecules
none of the above
micromolecule
34
which particle in the nucleus of an atom has a neutral charge
proton
carbon
electron
neutron
35
within the __ endoplasmic, proteins are packaged into membrane bound sacs called ___
rough, vesicles
rough, ribosomes
smooth, golgi apparatus
smooth, vesicles
36
a single covalent bond forms when two atoms do which of these
when one giver two electrons to the other
when they share one elctron
when they share two electrons
when one give an electron to the other
37
the __ helps give a cell its shape
cytoskeleton
DNA
cytosol
B and C
38
which of the following is the most significant result of technology
increased population growth, creating the need for additional food
caused the false belief that the problem was solved forever
caused salts to be deposited in soils
all of these
39
waxes, fats, and oils are all types of
nucleic acids
dna
carbohydrates
lipids
40
bacteria are example of
none of the above
eukaryotic
A and B
prokaryotic
41
a cell has 12 chromosomes. how many chromosomes will each daughter cell have
12
6
4
24
42
cytoplasm is
water and dissolved chemical materials such as proteins and minerals
the same as cytosol
the cytosol and all of a cells organelles except the nucleus
the gel-like fluid within a cell
43
which substance has at least one ionic bond
NaCI
CH4
O2
H2O
44
the first person who concluded that all animals were made up of cells was
charles darqin
matthias schleidan
rudolf virchow
theodor schwaan
45
which graph shows the correct changes in the amount of DNA in a cell as it moves thru one cell cycle
A
D
B
C
46
lysosomes can destroy an entire cell
true
false
47
in the peer-review process for a report of the results of a study on ecology of bees, who would an appropriate reviewer
physicist that keeps bees
politician that knew about bees
biologist studying insects
university president
48
living things do all of the following except
make adjustemts to nonliving factors around them
respond to other organisms
pass an identical genetic code to their offspring for many generations
maintain a steady internal environment
49
consider the energy for a chemical reaction, overall is energy released or absorbed
absorbed, the energy level of the products is greater
absorbed, the energy level increases during the reaction
released, the energy level of the reactants is greater than the products
releases, the reaction is initiated by the addition of heat
50
mitochondria vary in number and size among cells
true
false
51
a cell theory states all of the following except
all living things are composed of cells
all cells come from pre-existing cells by cell division
cells are the smallest working units of all living things
all cells have an outer rigid cell wall
52
which describes a major benefit that bio-engineering technology has provided to society
applications include larger capacity for handheld music devices
applications include more energy-efficient fossil fuels
applications include the development of new plastics for airlines
applications include the development of pacemakers and artificial limbs
53
the chromosomes are in which state of mitosis
anaphase
telophase
prophase
metaphase
54
which is not something a scientist would study
biology
botany
anatomy
astrology
55
chemical reaction occurs more rapidly when the reactants are held at 35C rather than 25C, why would this be the case
the activation energy would be higher
the net energy released would be greater
the net energy release would be lower
the activation energy would be lower
56
how is the alignment of chromosomes, on the equatorial plate of the cell maintained
they are always located there, since that is where the nucleus was
tension between opposite spindle fibers pulls them there
the pressure of the ccytoplasm moves them there
chromosomes are attracted to each other and meet there
57
which best describes the difference between an observation and an inference
you can record an observation an inference is an idea
an observation is a conclusion and inference is a hypothesis
you make and inference before you make observations
an observation is based on evidence and inference is not
58
which topic falls under the study of biology
the makeup of the atomosphere
rocks found in a riverbed
the digestive system of and earthworm
the chemicals in fuel
59
the cell wall of a plant cell is mostly made up of
cytosol
cellulose
nucleic acids
lipids
60
what is a possible benefit of studying plants in the rain forest
plants may make toxins for human consumption
plants may hold medicines to treat human diseases
plants may be cut down and sold in floral shops
plants may produce needed carbon dioxide
61
the plasma membrane of an animal cell includes all of the following except
cellulose
carbohydrates
phospholipids
lipids
62
the inner-most compartment of a mitochondrion is called the
matrix
cristae
lumen
cytosol
63
which of the following would most likely be the major focus of a biologist
location of hot springs
composition of water in hot springs
temperature of hot springs
bacteria found in hot springs
64
the total # of atoms in a molecule of sucrose, C12H22O11 is
11
45
12
22
65
which of the following are likely topics in a biology course
why does the texas horned lizard squirt blood out of its eyes
what chemicals cause plant stem to lengthen or flowers to bloom
all of these
how is a banded pipe fish able to hide in its environment of seaweeds
66
_{this illustrates which state of mitosis}
prophase
metaphase
telophase
anaphase
67
how does an enzyme influence a biological reaction
it decreases the activation energy necessary to initiate chemical change
it increases the net energy difference between reactants and products
decreases the kinetic energy of reactants
increases the kinetic energy of reactants
68
presented with new information that conflicts with previous findings, what would a scientist do in this situation
argue against the new information
evaluate the new information
keep the new information to himself
ignore the new information
69
which of the cells depicted in the line graph are most likely cancerous
A
D
B
C
70
a typical cell consists of about __ percent water
40
70
29
1
71
which element would need to be removed from the molecule to make it unsaturated
hydrogen
phosphorus
carbon
ocygen
72
__ contain digestive enzymes that break down large chemical particles or foreign material such as bacteria
ribosomes
mitochondria
lysosomes
plasma membranes
73
which of these occurred by the end of prophase
the nuclear membrane has disappeared
sister chromatids are separated
the cell membrane has begun to punch inward
the spindle is beginning to form
74
when paper burns in a fire, what is one reactant
water
fire
carbon dioxide
oxygen
75
because it is often difficult to gather numerical date, __ information is collected
descriptive
quantitative
scientific
ethical
76
the gelatinous fluid that surrounds all of the organelles within a cell is called
cellulose
cytoplasm
carbohydrate
cytosol
77
proteins are modified within
the mitochondria
the nucleus
the endoplasmic reticulum
the golgi apparatus
78
endocytosis is
the cellualr process of engulfing paricles, foreign material or microorgans
cell division
cell modifies proteins
cell exports proteins
79
which is an inference
you measure a plants height everyday for a week
you give a plant the same amount of water everyday
after watching a plant for a week you determine it needs more sunlight
everyday for a week you collect data on a plants movement
80
when an iron nail rusts, what is one product
iron
water
iron oxide
oxygen
81
the process by which plants use energy from sunlight to convert water & carbon dioxide into carbohydrates is
osmosis
mitosis
photosynthesis
cell respiration
82
which of the following is an observation
you hypothesize that the temperature will increase tomorrow
you propose that a cold front is approaching
you conclude that the season is changing
you record the air temperature everyday for a week
83
which best describes the purpose of science
to propose solutions to political issues
to explain the nature of things
to solve the ethical problems of society
to debate the meaning of life
84
a cells nucleus contains
cyttosol
cytoplasm
DNA
cellulose
85
what is the basis of the metric measurement system
it is based on European measurement standards
it is based on that wavelength of krypton- 86 radiation
it is the only scientific measurement system
its measures are based on divisions that are powers of ten
86
in the periodic table of the elements, elements in group 1 have how many outer electrons
4
0
1
8
87
a person studying a particular field has published her finding. the finding are not testable, this person is studying
astrology
physics
biology
chemistry
88
tasha is testing the effect of blue-colored light on the growth of tomato plants. what is the independent variable
light color
temperature of light
light intesity
amount of light
89
__ is made up of DNA coiled around proteins
histone
endoplasmic reticuli
Chromatin
ribosome
90
which is the best description of activation energy
heat stored within the product molecule
head added to initiate a reaction
heat released as the reaction proceeds
heat stored within the reactant molecule
91
the first microscope was created by the dutch naturalist __ in the 1600s
robert hooke
theodor schwaan
charles darwin
anton van leeuwenhook
92
the __ of phospholipids repel water, while the __ attract water
necks, tails
heads , tails
arms, heads
tails, heads
93
plant cells and animal cells are all
prokaryotic
none of the above
A and B
eukaryotic
94
by the end of prophase, each of the following has occurred except
lining up of chromosomes in the cell
disappearing of the nucleolus
breaking down of the nuclear envelope
tighter coiling of the chromosomes
95
which of the following results from quantitative analysis of family of rabbits
there isnt enough food
the babies are cold
these are the first offspring these rabbits have had
there are 8 off spring
96
the endoplasmic reticulum is connected to the nuclear envelope
false
true
97
which is the negatively charged particle located outside the nucleus of an atom
neutron
proton
electron
silicon

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