The most abundant gas in the atmosphere is __________.
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4.
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5.
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6.
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7.
When communities form in previous uninhabited areas, this is called _______________________ .
Other Answer Choices:
climax community
secondary succession
primary succession
a keystone species
Question 8
8.
A particular area contains snakes, lizards, hawks, and squirrels. Together these animals make up the area's ______________ .
Other Answer Choices:
ecosystem
habitat
community
population
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9.
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14.
The number of individuals of the same species in an area is the ____________________ . The number of individuals living in a specific unit area or volume is the _______________________ . The manner in which individuals are spread thorughout a given area is the given ____________________________ .
Other Answer Choices:
population demographics
population distribution
population density
population size
Question 15
15.
Density-independent factors are often __________
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24.
The geothermal gradient describes
the increase in temperature within Earth.
the increase in pressure within Earth.
the decrease in temperature within Earth.
the decrease in pressure within Earth.
The cryosphere encompasses
polar regions
mountain tops
ice shelves
all of the above
Which of the following are considered major constituents of ocean water?
chloride and sodium
calcium and flouride
potassium and bicarbonate
magnesium and strontium
What produces Earth's magnetic field?
the movement of Earth's tectonic plates
the pressure of Earth's crust upon Earth's mantle
the rotation of Earth's core
the bombardment of Earth's atmosphere by solar particles
In which layer of the geosphere does the asthenosphere lie?
core
mantle
oceanic crust
continental crust
If the primary consumers in a food chain become extinct, what will most likely happen?
The secondary consumers will also die out.
the secondary consumers will start eating decomposers.
The producer population will die out.
The secondary consumers will become tertiary consumers.
A certain ant species benefits from the food and shelter provided by the acacia tree. If the two species are in a mutualistic relationship, what happens to the tree in return?
The tree dies as a result of the ants' feeding behavior.
The ants attract other plants that compete for the tree's nutrients.
The tree get protection from the ands' defenses.
The tree does not suffer any consequences nor gains any benefits.
Which of the following best describes all pioneer species?
species that compete with other organisms
species at the top of the food chain
species that colonize new surfaces
species that cooperate with other organisms
Which statement best explains why producers are located at the bottom of the energy pyramid?
They are the source of energy for every other living thing.
There are more producers than any other organism
They require more energy than other organisms.
They are the least important members of the food chain.
How do parasitism and predation differ?
In predation, both organisms benefit, while in parasitism, both organisms are harmed.
The goal of predation is to kill the prey, while a parasite does not benefit from killing its host.
Parasitism occurs between microscopic organisms, while predation occurs between larger animals.
Parasitism occurs between a plant and an animal, while predation occurs between two animals.
When a population reaches carrying capacity the population size will
increase rapidly
decrease rapidly
stabilize
none of these; carrying capacity does not affect population size
As a population nears carrying capacity, the growth rate will stabilize. This is a demonstration of
linear population growth
negative population growth
exponential population growth
logistical population growth
A population with high infant mortality typically has which type of survivorship curve?
I
II
III
IV
Select all of the abiotic factors affecting the aquatic biome.
light
temperature
oxygen
bacteria
nutrient availability
algae
An organism has a respiratory system that can get oxygen from water, one fin on either side of their body, and the ability to expel excess salt. Select the statement below that correctly describes the organism.
The organism is adapted to breathing air because its respiratory system uses oxygen.
The organism is adapted to a freshwater biome because it has fins.
The organism is adapted to a marine biome because it has fins.
The organism is adapted to a marine biome because it can process salt in the water.
The taiga biome is most characterized by its
permafrost
high temperatures
grass meadows
coniferous forests
What are the most important climate factors that define a biome?
temperature and soil
temperature and precipitation
precipitation and soil
soil and longitude
Which of the following is a difference between tropical and temperate rain forests?
Only tropical rain forests contain a great diversity of life forms.
Tropical rain forests are only found at the equator. Temperate rain forests are found in coastal areas around the world.
Tropical rain forests receive hundreds of centimeters of rain. Temperate rain forests receive less than 100 centimeters.
Tropical rain forests are home to a diversity of mammals, while tropical rain forests only have birds, reptiles, and amphibians.