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Biology Semester Test
Biology Semester Test
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1
Which of the following best describes active transport?
does not use chemical energy
moves substances against concentration gradient
forms vesicle around a particle
relies on diffusion
2
Chemical reactions that absorb more than they release are called
exothermic
endothermic
catalyzed
activated
3
No greenhouse effect equals
too cold on earth for life
only forests exist on earth
too hot on earth for life
only algae exists
4
Herbivores are considered which of the following
secondary consumers
tertiary consumers
producers
primary consumers
5
Smallest basic unit of matter
compound
atom
cell
molecule
6
What phrase describes biodiversity?
number of different species
amount of energy
amount of biomas
number of individual in a species
7
When two species compete for same resources, the resource gets divided. This is called
niche equivalency
niche partitioning
evolutionary response
ecological equivalencey
8
Cell theory establishes which of the following conclusions?
All cells form by free-cell formation
All cells have a cell wall.
All cells are produced by other living cells.
All cells have the same size and shape.
9
The freshwater littoral zone is similar to which ocean zone?
abyssal
intertidal
bathyal
neritic
10
What is an inherited trait and gives advantage to organisms?
evolution
metabolism
adaptation
homeostasis
11
Scientist use scientific thinking to test
hypothesis
data
conclusions
observations
12
A regions climate, unlike its weather, is based on
conditions in small areas
a long-term pattern
daily rainfall
seasonal extremes
13
A group of organisms of the same species that live in the same area are called
biome
ecosystem
population
community
14
What organelle stores DNA?
ribosome
nuclues
choloroplast
mitochondria
15
Communities on a mountain differ depending on the
elevation
latitude
vegetation
precipitation
16
The neritic zone is equivalent to the
continental shelf
seamount
ocean surface
abyssal plain
17
An organism that has a large affect on the ecosystem is called
indicator species
omnivore
invasive species
keystone species
18
Substances are changed into different substances when bonds break and form during
ion formation
hydrogen bonding
chemical reations
chemical equilibrium
19
The various parts of Earth's biosphere are connected and
diverse
aquatic
nonliving
similar
20
How is a eukaryotic different from a prokaryotic cell?
It has cytoplasm
it has DNA
It has a nucleus
It has a cell membrane
21
Which organelle breaks down old cell parts?
chloroplast
lysosome
vacuoles
centrosome
22
Which of the following increases size of a population?
immigration and death
immigration and births
emigration and births
emigration and death
23
The reestablishment of a damaged ecosystem where soil is intact is called
pioneer succession
primary succession
secondary succession
symbiotic succession
24
Which of the following are most important for homeostasis
diversity
metabolism
negative feedback
dependence
25
All organisms use ATP for chemical reactions. All processes are called
evolution
metabolism
adaptation
homeostasis
26
What feature is found in plant cells but not in animal cells?
cell walls and chloroplasts
vesicles and vacuoles
mitochondria and ribosome
centrioles and centrosomes
27
Understanding biology helps evaluate issues based on
economics
hypothesis
someone else's opinion
evidence
28
Tiny free floating animals that live in water are called
protists
zooplankton
algae
phytoplankton
29
Which aspect of a chemical reaction is affected by enzymes
direction
pH
rate
equilibrium
30
What factors are observed and measured during an experiment?
hypotheses
dependent variables
independent variables
constants
31
What is a characteristic of the wetlands
never dry up
don't provide homes
little water flowing through
saturated all year
32
What type of data is numerical measurements?
qualitative
observations
hypothesis
quanitative
33
Pioneer species are the first
trees that replace trees after a fire
trees to grow in disturbed area
organisms that live under the canopy
organisms that live in uninhabited area
34
Hawks and foxes compete to eat field mice. This is called
Intraspecific predation
random dispersion
interspecific competition
competitive exclusion
35
When molecules share pairs of electrons it is called
hydrogen bonds
ionic bonds
poymers
covalent bonds
36
Biodiversity generally increases from the
equator to the poles
poles to the equator
south to north
east to west
37
Nesting birds often place themselves evenly in nests. This pattern is called
uniform
type 1
clumped
random
38
What is unique about carbon?
ability to bond with oxygen
properties as a reactant
bonding properties
properties as an enzyme
39
Almost all autotrophs get energy from the
hydrothermal pools
decaying matter
sunlight
producers
40
What converts nitrogen into ammonia in the cycle?
trees
squirrels
grasses
bacteria
41
What biome is biodiversity the highest?
tropical rainforest
grasslands
temperate rainforest
desert
42
How many people can Earth support
20 billion
none
10 billion
an unknown number
43
Which of the following is a density-dependent limiting factor
unusual weather
competition
human activities
natural disaster
44
The uppermost layer of branches in the rain forest is called the
shade layer
canopy
epiphytes
limiting layer
45
What organelles are unique to plant cells?
ribosome
mitochondria
nuclues
choloroplast
46
Which sentence best describes exocytosis?
A vesicle fuses to the cell membrane and its contents leave the cell.
A vesicle fuses to the nuclear envelope and its contents enter the nucleus.
A vesicle fuses to a lysosome and its contents are destroyed.
A vesicle fuses to the cell membrane and its contents enter the the cell.
47
Trees that drop leaves are known as
coniferous trees
evergreen trees
arctic trees
deciduous trees
48
Because the manatee is umbrella species, protecting it may lead to
decrease in populations
protection of a few of other species
protection of many other species
pollution in waterways.
49
A watering hole on the savanna would be part of a zebra's
behavior
habitat
niche
biotic factors
50
What do all biotic and abiotic factors in a given area make up?
ecosystem
population
community
habitat
51
Which solution has the H+ ion concentration?
pH 1
pH 4
pH 10
pH 7
52
What are renewable resources?
resources that can replenish themselves over time
resources that formed over millions of years
resources that formed over millions of years ago
resources that are used faster than formed
53
What characteristics does a tropical rainforest have
dry season
no diversity
little rain
little nutrient soil
54
Which of these is an example of parasitism?
leech feeds on hosts blood
polar bear eats seal
squirrel stores food in tree
lion defends territory
55
Which of the following provide most of the energy in an ecosystem?
generalist
keystone
carnivore
producer