Which of the following is an example of a community?
The process by which the volcanic island Surtsey has progressed from bare lava in 1963 to an island with vegetation and animal life today is known as
On the African savanna, large herbivores such as elephant and giraffe would be found in
Most climate models predict that during this century, the average temperature
Russian thistle, better known as tumbleweed. It was accidentally introduced into the United States in the nineteenth century in contaminated flax seed. The fact that it has spread throughout the western United States suggests that
Deforestation has the effect of
Food webs differ from food chains in that they
Ants are known to protect, or tend aphids from predators, and in return receive some nutrients from the aphids. This relationship is an example of
Bees collect nectar from flowers, and serve as pollinators for the plants. This relationship is an example of
A relationship between two organisms of different species in which one benefits, while the other neither benefits nor is harmed:
When the fish is provided with so much food that it cannot eat all of it, the excess food
An organism that feeds only on heterotrophs is a(n)
The source of the carbon in fossil fuels is
If the ecosystem above was contaminated with the pesticide DDT, the highest concentration of DDT would be found in
During a particularly hot summer, the smallest change in temperature would likely be noted in
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