Temperature, tides and climate are three BIOTIC factors in Dartmouth.

A rattlesnake, cactus and armadillo would be ABIOTIC factors in the desert.

A whale and a shark could have the same HABITAT.

A NICHE is the specific role that an organism has in its community (such as space requirements, food requirements, shelter, etc)

The habitat of a lion would be the ARCTIC TUNDRA.

Only 10% of the available energy of a trophic level is passed on to the next level (in a food pyramid or food chain).

Organisms that eat meat and vegetables are called HERBIVORES.

Organisms that eat leftovers from another organisms kill are called DECOMPOSERS.

A PARASITE is an organism that feeds off of a living host.

A clownfish is very well adapted for life in the coral reef. It survives within the stinging tentacles of the anemone. The anemone would be described as the ___________________ of the clownfish.

Ambystoma tigrinum is an organism native to Texas and other southern states. It eats just about anything that moves: mosquito larvae, worms and crickets. A. tigrinum must be a ....

Maggots receive their nutrition by breaking down dead, decaying matter. Organisms that get their nutrition by recycling waste are _______________________.

In Africa, a species of tree called the Acacia provides a unique and safe habitat for ants. The ants, in return, recycle nutrients for the Acacia tree to use and keep predators away. The type of relationship between the ants and the acacia tree would best be described as ...

Barnacles are arthropods that attach to the skin of whales in order to find more food and avoid predation. There is not much benefit to the whale in any way. The relationship between the barnacle and the whale would best be described as ...

Which cycle is represented by figure 13.1?

The diagram below shows and energy pyramid. There are 10,000 kcal/m2/yr of energy available to producers. Approximately how much energy is available to the secondary consumers?

Which of the following trophic levels is NOT shown in this diagram?

In one of the steps of the Carbon cycle, a person exhales a molecule of carbon dioxide (CO2) into the atmosphere. Which of the following is most likely to happen next to the atom of carbon in this molecule?

A partial food web for a marsh ecosystem is shown below. The removal of which of the following organisms would MOST reduced the transfer of energy from aquatic organisms to terrestrial organisms?

There is a limit to how large any given population can grow. Which of the following statements BEST explains why a population must eventually stop growing?

Sea otters are small marine mammals that prey on fish, clams, crabs, and sea urchins. Sea otters’ natural predators include bears, sharks, and killer whales, but humans have also threatened sea otter populations. Hunting of sea otters for their fur severely reduced sea otter populations in the 18th and 19th centuries. After laws and programs were put into place to protect sea otters, their populations started increasing. Reduction in the sea otter population affected the Pacific Coast ecosystem by ...

Why are invasive species a threat to biodiversity?

True / False: The largest number of organisms that an ecosystem can support is called the CARRYING CAPACITY.

The graph above shows the variation in the deer population in the Kaibab Plateau from 1905 to 1939. Between 1907 and 1923, the natural predators of deer were eliminated from the area by hunters. What was the most likely reason for the decline in the deer population after 1924?