Retake SB5.b Energy and Matter in Ecosystems

• A

• B

• C

• D

Which organism recieves the least amount of energy from the producer?

• Owl
• Grasshopper
• Lilypad
• Mouse

What happens to the nitrogen at W?

• It is converted to a usable form and put into plants by bacteria.

• It is inhaled and turned into proteins by the rabbit.

• The nitrogen gas is taken in by the tree roots.

• It bonds with other molecules in the atmosphere.

Letter M provides a way for phosphorus to get into animals. What does letter M represent?

• soil

• air

• rocks

• plants

If there is 2500 kcal at the bottom level, how many kcal will be at trophic level 3?

• 2.5

• 25

• 250

• 2500

What would most likely happen in the ecosystem if the moose disappeared?

• The number of wolves would increase, as they would no longer compete with moose for food resources.

• The number of earthworms would decline as the amount of available organic matter would decrease.

• The number of beavers would decline because they would become the wolves primary food source.

• The number of trees would decline, as moose would no longer fertilize them.

If you were making a food web using the information in the chart, which organism would have four arrows pointing to it?

• rattlesnakes

• desert grasses

• mice

• hawks

The products of cellular respiration are:

• Carbon Dioxide, Energy (ATP) and Water

• Oxygen and Glucose

• Water and Glucose

• Oxygen and Water

Cellular respiration is important because it allows living things to release the energy from glucose. Which is the balanced equation for cellular respiration?

• C₆H₁₂O_{6 +} 6O₂ −−> 6CO₂ + 6H₂O + ATP Energy

• 6CO_{2 +} 6H₂O + Sunlight −−> C₆H₁₂O_{6 +} 6O₂

Plants are an important part of the food web and the carbon cycle. What do plants need to perform photosynthesis?

• Love

• Soil with a high nitrogen (N) content

• Water (H₂O) + Carbon Dioxide (CO₂) and Sunlight Energy

• Pollinators such as bees and hummingbirds