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Barnacles are animals that cannot move. In order to get food, they attach to whales and catch any floating plankton in the water. The whale is neither helped nor harmed in the interaction. What type of symbiosis is this?
In the wild, some alligators get their teeth cleaned by birds. The birds get their food from the alligators' teeth. What type of symbiosis is this?
In an ecosystem, there are populations of moose, rabbits, grass, and pine trees. Suddenly, a fire blazes through the area, which kills all of the populations. As the months go on, new species of grass begin to take root. This attracts animals, and eventually the ecosystem is restored.
What type of ecological succession happened?
None of the above
In this photo, what is an abiotic factor?
Which of the following is an example of a decomposer?
What is an autotroph?
an organism that gets energy from eating other organisms
an organisms that uses sunlight to make its own food
an organism that gets energy from eating dead organisms, non-living material or waste
The shrew provides energy for the -
Where do all life forms get their energy?
The wavy arrows shown in the food chain most likely indicate -
the release of heat energy into the environment
the release of oxygen produced by respiration
the absorption of heat energy into the organism
the inhalation of oxygen during respiration.
A pod of dolphins hunting and feeding on a school of fish is an example of -
an ecosystem interaction
a population interaction
a community interaction
a biome interaction
78% of Earth's atmosphere is nitrogen gas. The type of organism that is responsible for "fixing" nitrogen (or helping to put it in a form so other living things can use it) is -
Identify the characteristic of life: Green plants produce their own food through the process of photosynthesis.
All living things use energy
All living things contain cells
All living things maintain homeostasis
All living things grow
What is the carrying capacity of the graph?
more than 800
less than 300
Which factor limits a population’s size, especially as population numbers become large and dense?
competition for food
sea level height
The golden-cheeked warbler is a bird that inhabits Central Texas. It requires older growth forest with a denser tree canopy where they forage for a variety of insects, including caterpillars. The clearing of old juniper woodlands for livestock grazing and urban expansion has decreased the area available for nesting. Its resulting endangerment is most likely due to -
the introduction of a predatory species
the introduction of an invasive species