Ecology Final

Collectively, all the biotic and abiotic components in a particular area are best described as which of the following?

• Community

• Ecosystem

• Niche

• Population

Tags

NGSS.MS-LS2-3

Cougars are predators that often eat weakened or diseased animals. This is a description of the cougar's ___.

• Habitat

• Community

• Niche

• None of these

The group of elephants (ONLY the elephants) in the figure below constitutes which level of organization?

• Community

• Ecosystem

• Population

• Biosphere

In the habitat of an earthworm, what would soil be classified as?

• An abiotic factor

• A biome

• A biotic factor

• The sole phosphorus source

Which process describes nitrogen fixation?

• Animals eat plants containing nitrogen and return it to the soil through urination.

• Bacteria take nitrogen from the air and convert it to a form usable by plants.

• Organisms die and its nitrogen goes into the air as a form of nitrates.

• Plants take nitrogen from the air and store it in their roots.

Tags

NGSS.MS-LS2-3

The flower at the beginning of the food chain in the diagram above are which of the following?

• Consumers

• Decomposers

• Producers

• Heterotrophs

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The snake in the food chain in the diagram above would be considered which of the following?

• Autotroph

• Primary consumer

• Tertiary consumer

• Quaternary consumer

Tags

NGSS.MS-LS2-3

What animals eat both producers and consumers?

• Herbivores

• Omnivores

• Chemotrophs

• Autotrophs

Assume that 10% of the energy absorbed by one trophic level is transferred to the next successive level and the same amount of energy is available at the primary producer level of each of these food chains: Chain 1: Phytoplankton → Zooplankton → Smelt → Trout → Humans Chain 2: Phytoplankton → Smelt → Humans How much energy would be available to humans in Food Chain 2 as compared to the energy available to humans in Food Chain 1?

• 10 times less energy

• 10 times more energy

• 100 times less energy

• 100 times more energy

Tags

NGSS.MS-LS2-3

Referring to the diagram of a food chain from grass to owl, suppose 10,000 units of energy are available at the level of the grasses. What is the total number of energy units lost by the time energy reaches the owl?

• a. 90 units

• b. 990 units

• c. 9900 units

• d. 9990 units

Tags

NGSS.MS-LS2-3