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The branch of biology dealing with interactions among organisms and between organisms and their environment is called
All of the members of a particular species that live in one area are called a(an)
What is the original source of almost all the energy in most ecosystems?
An organism that produces its own food supply from inorganic compounds is called a(an)
Which of the following organisms does NOT require sunlight to live?
An organism that cannot make its own food is called a(an)
They both produce their own food source (carbohydrates).
In which way are green plants in a sunny mountain meadow and sulfur bacteria in a deep-sea volcanic vent alike?
Organisms that break down and feed on wastes and dead organisms are called
What is an organism that feeds only on plants called
All the interconnected feeding relationships in an ecosystem make up a food
What animals eat both producers and consumers?
What is the term for each step in the transfer of energy and matter within a biological community?
A bird stalks, kills, and then eats an insect. Based on its behavior, which ecological terms describe the bird?
A snake that eats a frog that has eaten an insect that fed on a plant is a
eliminated as heat
Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life processes, and the rest is
The repeated movement of water between Earth's surface and the atmosphere is called
Which of the following is NOT recycled in the biosphere?
Atmosphere, underground, in oceans
How is carbon stored in the biosphere?
Nitrogen fixation is carried out primarily by
Bacteria, Plant roots, and decomposers
Which of the following has a direct role in the nitrogen cycle?
The average year-after-year conditions of temperature and precipitation in a particular region is the region's
a natural phenomenon that maintains Earth's temperature range.
angle of heating (tilt of axis).
Earth has three main climate zones because of the differences in latitude and
Plants, Fungus, Bacteria and Animals (Anything living)
number and kinds of predators in the ecosystem
Which is a biotic factor that affects the size of a population in a specific ecosystem?
An organism's niche is
the way the organism uses the range of physical and biological conditions in which it lives (how the organism lives and survives).
No two species can occupy the same niche in the same habitat at the same time
because of the competitive exclusion principle.
The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of
mutualism because the flower provides the insect with food, and the insect pollinates the flower.
Primary succession can begin after
a lava flow.
Living organisms modify their environment a little at a time.
Which of the following occurs during the ecological succession of an ecosystem?
Which biome is characterized by very low temperatures, little precipitation, and permafrost?
characteristic ecological community (biotic factors).
A biome is identified by its particular set of abiotic factors and its
hooks, streamlined bodies, and suckers
What are adaptations that organisms have for living in flowing water?
Kelp, Sea Urchins, and Killer Whales
Sea otters are important to the populations of
There are 150 Saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer?
The birthrate becomes higher than the death rate.
What occurs in a population as it grows?
If immigration and emigration numbers remain equal, which is the most important contributing factor to a slowed growth rate?
When individuals in a population reproduce at an unlimited constant rate, it is called
A biotic or an abiotic resource in the environment that limits the size of a population is a
The number of organisms that an environment can support over a relatively long period of time is called
They require hundreds of millions of years to form.
Why are fossil fuels nonrenewable?
Using renewable resources while ensuring that they are not depleted is a practice called
is a natural resource, provides food and goods, provides medicines.
Biodiversity is important to human society because it
a group of organisms near extinction.
One of the greatest threats today to biological diversity is
As DDT moves up the trophic levels in food chains, or food webs, its concentration
enforce environmental laws, protect habitats, and manage natural resources.
Goals of conservation biology is to
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