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Midterm Study Tool 1/2
Midterm Study Tool 1/2
100 terms
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1
Density, distribution, and growth rate are characteristics used to classify which one of the following?
populations
limiting factors
age structure
biomes
2
Which of the following resources can be considered renewable?
natural gas
quartz
wood
uranium
3
Which class of macromolecules stores and communicates genetic information?
protein
lipid
carbohydrate
nucleic acids
4
What model would best show many different interconnected feeding relationships among organisms in an ecosystem?
biomass pyramid
food chain
food web
energy cycle
5
Ecology is the scientific discipline that studies all the interactions between which factors?
different forms of matter on Earth
all the different regions of Earth
organisms and their environments
humans and their polluting behaviors
6
Compared to a natural forest, what does a farmer’s wheat field lack?
stored energy
significant biodiversity
autotrophs
heterotrophs
7
Amino acids are the building blocks of which macromolecule?
DNA
lipid
carbohydrate
protein
8
specialized internal cell structure, carries out specific cell functions such as prtein sythesis, energy transformation
atom
cell
mitochondria
organelle
9
The flexible, selctively permeable boundry that helps control what enters and leaves the cell called the _____?
plasma membrane
nucleus
cytoplasm
cell wall
10
Which is an optical instrument that uses multiple lenses to magnify an object?
transmission electron microscope
simple microscope
compound microscope
scanning electron microscope
11
Which best describes the connections of the cell theory to microscopes?
the development of the cell thory inspired people to improve existing elect
the microscope was invented so scientists could develop the cell theory
the invention of electron microscopes caused scienti
The invention of microscopes made the developement of cell theory possible
12
Whiat is the supporting network of protein fibers that provide a framework for the cel within the cytoplasm?
centriole
vesicle
cytoskeleton
cytoplasm
13
a student is asked to determine if the cells under a microscope are plant cells or animal cells. characteristics?
rubisomes and vaculoes
a cell membrane and mitochondria
chloroplasts and cell wall
a nucleus with ribosomes
14
Which organelle would be called the "powerhous of the cell" because it converts food into energy
vesicle
nucleus
mitocondria
ribosomes
15
Which of the following is NOT considered when determining a country's ecological footprint?
amount of land used for development
amount of land used for farming
amount of forest needed to absorb carbon dioxide emissions
amount of water used
16
Which defines a cell?
the smallest type of animal
the basic unit of living things
microscopic organisms in water
protein molecules in animals
17
Which is true about the way water interacts with a cell’s plasma membrane?
It requires no energy to enter a cell but can only exit by active transport
It diffuses freely both in and out of the cell.
It enters and leaves the cell by endocytosis and exocytosis.
It must cross through a transport protein.
18
Which of the following describes a grasshopper’s niche, but not its habitat?
locations where it shelters
temperatures it experiences
methods used to find food
biome where it lives
19
Which molecule results from the final step of the Calvin cycle?
RuTP
COA
COB
RuBP
20
What major improvement came with the developmetn of the scanning electron microscope (SEM)?
The SEM was less complex and more available to scientists
the SEM could observe living tissues
the SEM imageswere 3D
The SEM could observe unstained specimetns
21
A hydrogen bond can form between a hydrogen atom of one molecule and which atom of another molecule?
oxygen
hydrogen
sodium
carbon
22
Which organism follows an r-strategy for reproduction?
robin
human
mayfly
zebra
23
Which best describes the components of an ecosystem?
the plant species in an area
the animal groups in an area
the nonliving things in an area
living and nonliving things in an area
24
Which habitat would most likely hold autotrophs that derive their energy from chemical compounds?
grassland soil surface
swamp sediments
desert rocks
Antarctic pools
25
How does this magnification compare with the magnification of a compound light microscope: 500,000 times magnification
500x lower
100x lower
500xhigher
100x higher
26
Why do many scientists think that prokaryotes are similar to the first organisms on Earth?
prokaryote cells are complex
Prokaryote cells have no nucleus and are small in size
prokaryote cellshave membrane-bound organelles
prokaryote cells are all plantlike
27
What can change the range of a population?
both biotic and abiotic factors
biotic factors
nothing
abiotic factors
28
Capillary action is the result of adhesion. Which aspect of water is responsible for this?
nonpolar covalent bonds that enable water to dissolve other substances
hydrogen bonds between water and another substance
polar covalent bonds that join molecules of water to other substances
ionic bonds enable electrons to flow through water and in another substance
29
The semifluid material inside the cell's plasma membrane is called the ____?
nucleus
plasma membrane
cytoplasm
cell wall
30
Which organelle is present in a paramecium protozoan but absent in the cells of a strawberry plant?
nucleus
cilia
microtubules
cytoskeliton
31
A single covalent bond forms when two atoms do which of these?
when they share two electrons
when they share one electron
when one gives two electrons to the other
when one gives an electron to the other
32
Which biome experiences the greatest temperature extremes?
tropical rain forest
desert
tropical seasonal forest
tundra
33
Which is the property of the plasma membrane that allows it to control movemtn of substances into or out of the cell?
fluid mosaic model
selective permeability
transport protein
phosophilipid bilayer
34
Which is the only biogeochemical cycle that lacks an atmospheric reservoir?
Phosphorus
Oxygen
Nitrogen
Carbon
35
Which is formed during the light-independent phase of photosynthesis?
pigment molecules
ATP
glucose molecules
NADPH
36
What is true of fossil fuels?
They are found in most places across the world.
They are renewable and clean.
They provide most of the energy in the United States.
They are radioactive.
37
Which type of macromolecule provides a ready source of energy for cells?
lipids
nucleic acid
proteins
carbohydrates
38
The bacterium E. coli is a _________ cell because it lacks both a nucleus and membrane-bound organels.
prokaryotic
eukaryotic
39
Which statement is true of all prokaryotic cells?
they have no cytoplasm
they have membrane-bound organelles
The cells have no nucleus
they are eukaryotes
40
Which organelle is the primary site of protein production?
golgi aparatus
endoplasmic recticulum
nucleus
ribosome
41
Which of the following does not affect the range of a population?
abiotic conditions like rainfall and sunlight
the distribution of food and other resources
the carrying capacity of a population
the existence of predators or parasites
42
Which is the final stage of aerobic respiration?
glycolysis
fermentation
Krebs cycle
electron transport chain
43
On ten acres of forest: 8 deer, 7 coyotes, 45 armadillos, & 231 pine trees. Which population has the highest density?
coyotes
pine trees
armadillos
deer
44
Which human activity has probably contributed most to the acidification of lakes in forests?
burning fossil fuels that produce air pollution
passing environmental protection laws
using pesticides for the control of insects that feed on trees
establishing reforestation projects in lumber areas
45
Which do many scientists consider the most major threat to biodiversity?
invasive species
pollution
overexploitation
habitat destruction
46
What types of materials are expelled from cells during exocytosis?
large molecules such as hormones
positive and negative ions
small molecules such as carbon dioxide
water and glycerol
47
Sacs that fuse with the plasma membrane to release proteins outside of the cell are called
ribosomes
vacuoles
lysosomes
vesicles
48
Which type of chemical bond forms when electrons are shared between two or more atoms?
covalent bond
carbon bond
ionic bond
49
Which organelle is large in plant cells but small or absent in animals cells?
nucleolus
centriole
bacuole
chloroplast
50
Organisms with overlapping resources probably have which type of relationship?
competitive
commensal
parasitic
mutualistic
51
Which scientist first used the term cell?
Pasteur
Virchow
Hooke
Janssen
52
Which describes a charged atom that has lost or gained electrons?
catalyst
ion
isotope
acid
53
Which structure is only found in plant cells?
plasma membrane
nucleus
cell wall
ribosome
54
Which is a disadvantage of a transmission electron microscope (TEM)?
thin slices of tissue are required for viewing cells with a TEM
IMages of cells and microorganisms can only be magnified by 1000 X
Electrons are transmitted through a speciment onto a gluorescent screen
the specimin viewed must be nonliving
55
Which class of macromolecules stores and communicates genetic information?
nucleic acids
carbohydrate
lipid
protein
56
Which is an example of uniform dispersion?
random elephant groups
school of silverside fish
one large buffalo herd
territorial jaguar pairs
57
Why are certain elements grouped into the same period on the periodic table of the elements?
because they form the same type of chemical bonds
because they have the same number of electron energy levels
because they have the same chemical properties
because they form the same type of isotopes
58
What is true of populations of k-strategists?
They produce as many offspring as possible in a short period of time.
They are controlled by density-dependent factors.
They are controlled by density-independent factors.
They do not reach equilibrium at the carrying capacity.
59
Which is a density-independent factor for a flock of Canada geese on a large lake?
intestinal worms
unusually cold winter
dwindling food supply
infectious virus
60
Which helps maintain a dog’s homeostasis by preventing a drastic change in body temperature?
hunting
panting
sleeping
eating
61
Which is the negatively charged particle located outside the nucleus of an atom?
silicon
electron
proton
neutron
62
The typical growth period of a cell occurs during which stage of the cell cycle?
Synthesis
Gap 1
Gap 2
Mitosis
63
What is released at each level of a pyramid of energy?
decomposers
heat
animals
plants
64
Where in the cell does glycolysis occur?
cristae of the mitochondria
matrix of the mitochondria
cytosol
intermembrane compartment of the mitochondria
65
rigid barrier that surrounds the outside of plasma membrane is made of cellulose and provides support and protection
nucleus
cytoplasm
cell wall
plasma membrane
66
below
producers
decomposers
carnivores
herbivores
67
Which habitat would most likely hold autotrophs that derive their energy from chemical compounds?
desert rocks
grassland soil surface
Antarctic pools
swamp sediments
68
Which occurs during the Krebs cycle?
capturing light energy
breaking down pyruvate
creating glucose molecules
producing ethyl alcohol
69
Which type of macromolecule forms long structures that allow muscle cells to contract during movement?
carbohydrate
lipid
protein
nucleic acid
70
Which property is responsible for the fact that water and oil do not mix?
phase
density
polarity
mass
71
Which two mineral ions are affected by a pump located in a cell's plasma membrane?
oxygen and glucose
magnesium and phosphorus
calcium and iron
sodium and potassium
72
Which type of macromolecule will not dissolve in water?
nucleic acid
carbohydrate
protein
lipid
73
Which is an advantage of a compound light microscope over a transmission electron microscope (TEM)?
a compound light microscope does not blur magnifield images
A compound light microscope relies on readily available visible light
A compound light microscope has a greater degree of magnification
A compound light microscope can view living microorganisms
74
Which of the following climates is not dependent on latitude?
tropical
polar
alpine
temperate
75
In which year did the human population reach 1 billion?
1804
1000
1000 B.C.
2011
76
Name?
angelina
angelina
77
During the carbon cycle, in what form are carbon atoms generally returned to the atmosphere?
simple sugars
methane
carbon minoxide
carbon dioxide
78
Which organelle is large in plant cells but small or absent in animals cells?
centriole
bacuole
nucleolus
chloroplast
79
Which is recycled through the Krebs cycle?
nucleic acid
FAD
NADH
citric acid
80
ATP is a compound that is synthesized when which occurs?
Energy stored in nitrogen is released forming amino acids.
Chemical bonds between carbon atoms are formed in photosynthesis.
Digestive enzymes break amino acids into smaller parts.
Energy stored in chemical bonds is released during cellular respiration.
81
The ________ is the basic unit of structure and organization of all living organisms.
cell
cell membrane
cytoskeliton
atom
82
Why are mice an example of an r-strategist?
They expend great energy raising young.
They produce few individuals.
They maintain populations near the carrying capacity.
They produce many offspring.
83
As energy flows through trophic levels of an ecosystem, about how much is lost as heat to the externalenvironment?
90%
10%
50%
100%
84
What are unspecialized human cells called?
stem cells
mitotic cells
cancer cells
signal cells
85
Which is a characteristic of exponential population growth?
Initial population growth is rapid.
Growth rate is inversely proportional to population size.
Resources are consumed exponentially during all phases.
The lag phase follows rapid growth.
86
Which is the only biogeochemical cycle that lacks an atmospheric reservoir?
nitrogen
oxygen
carbon
phosphorus
87
Which partly explains why the domestication of animals tended to increase the human food supply?
Domesticated animals had to be fed as well.
Domesticated animals were playful companions.
The fur, skin, and feathers of domesticated animals could be used for trade
Domesticated animals provided food and labor for cultivation.
88
Which cell type would you expect to have the most mitochondria?
skin cells
muscle cells
methanogens
cyanobacteria
89
What did scientists observe using the earliest microscopes?
tiny organisms
molecules
atoms
cell organelles
90
Which of the following is the second step of the Calvin cycle?
Chemical energy is transferred to 3-PGA molecules.
Molecular nitrogen is fixed into nitrate.
Two phosphate groups are joined to form glucose.
Rubisco converts organic carbon dioxide into inorganic molecules.
91
When a population reaches the carrying capacity, what happens to the death rate?
It will fluctuate greatly.
It will increase.
It will decrease.
It will not change.
92
A flea feeds on the blood of a cat. This is an example of what type of relationship?
parasitism
mutualism
commensalism
competition
93
Which structure is part of the cell's skeleton?
golgi apparatus
mitochondria
plasma membrane
microfiliments
94
What type of compound is made up of atoms held together by covalent bonds?
molecule
ion
element
isotope
95
___ are long, tailed-like projections with whiplike or propeller motion that help a cell move.
vacuoles
cilia
lythosomes
flagella
96
Which is the only biogeochemical cycle that lacks an atmospheric reservoir?
Nitrogen
Carbon
Oxygen
Phosphorus
97
In which biogeochemical cycle is ocean acidification a result of human activities?
carbon
phosphorous
water
nitrogen
98
_____ cells contain a nucleus and are large and complex compared to cells that do not contain a nucleus.
eukaryotic
procaryotic
99
Why do many scientists think that prokaryotes are similar to the first organisms on Earth?
prokaryote cellshave membrane-bound organelles
prokaryote cells are complex
prokaryote cells are all plantlike
Prokaryote cells have no nucleus and are small in size
100
How is a country's ecological footprint measured?
barrels of oil used per person
total food consumed per country
area of land used per person
industrial metals used per country