Unit Test - S7L4

True or False: The arrows in a food chain and food web will always point towards the organism that is doing the eating.

• True

• False

Answer explanation

True; arrows are showing the flow of energy so they should point to the organism that is eating

Tags

NGSS.MS-LS2-3

The flow of energy moves in a circle through a food chain. The energy moves from the grass to the grasshopper. Next, the transfer of energy passes from the snake to the hawk. Finally, the fungi help by breaking down the hawk when it dies, and returns the energy to the grass. Where does the energy that is transferred through this chain originate?

• Fungi

• Grass

• Grasshopper

• Sun

Answer explanation

All plants rely on the sun. All animals depend on plants. Some animals eat plants for food, and some animals consume other animals that eat plants for food.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Examine the energy pyramid shown above. Suppose that your teacher hands you a clump of grass and a rabbit. You are told to place them on the correct level of the energy pyramid. On which levels would you place the grass and the rabbit?

• Grass on level B, Rabbit on level A

• Grass on level D, rabbit on level E

• Grass on level E, rabbit on level D

• Grass on level A, rabbit on level B

Tags

NGSS.MS-LS2-3

In the ecological/energy pyramid, organism A represents a

• carnivore

• decomposer

• herbivore

• producer

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Beginning with the producer, which represents the correct order in a typical food chain?

• mountain lion-fox-rabbit-grass

• grass-fox-rabbit-mountain lion

• grass-rabbit-fox-mountain lion

• rabbit-fox-mountain lion-grass

Tags

NGSS.MS-LS2-3

In the pyramid, only about 10 percent of the __________ available within one trophic level is transferred to organisms at the next trophic level.

• energy

• heat

• mass

• matter

Tags

NGSS.MS-LS2-3

Based on the energy pyramid seen here, which group of organisms is the primary consumer?

• predator fish

• birds and mammals

• insects and zooplankton

• phytoplankton and bacteria

Tags

NGSS.MS-LS2-3

Clownfish have evolved resistance to the deadly stings of sea anemones. The sea anemone provides protection for the clownfish from predators and leaves the uneaten remains of its prey for the clownfish to finish off. Meanwhile the clownfish helps attract prey to the sea anemone with its bright colors.

The relationship between clownfish and sea anemones is a form of symbiosis called

• commensalism

• mutualism

• parasitism

• competition

Answer explanation

Mutualism is a relationship between organisms in which both species mutually benefit from the interaction. The clownfish draws in the prey; the anemone kills it and eats most of it; then the clownfish gets to finish the rest of it.

Tags

NGSS.MS-LS2-2

The remora has a front dorsal fin that acts like a suction cup. It uses this fin to attach to whales, sharks, or rays and eat the scraps their hosts leave behind. What type of relationship is this? Defend your choice.

• It is a mutualistic relationship because both animals benefit; neither animal is harmed.

• It is a symbiotic relationship because the remora benefits by eating the larger animals' scraps.

• It is an example of commensalism because the remora benefits from the food scraps while the shark, in this case, is neither helped or harmed.

• The key word is host. The shark is the host; the remora is a parasite. This is a parasitic relationship.

Tags

NGSS.MS-LS2-2

Ecosystems are made up of living and non-living components. What is a single living thing called?

• organism

• community

• ecosystem

• population

Tags

NGSS.MS-LS1-1