2/13 Energy Flow in Ecosystems

Which sequence shows a correct path for the flow of energy in a food chain?

• grass → caterpillar → sparrow → hawk

• grass → grasshopper → frog → snake

• fungi → beetle → algae → mouse

• algae → snake → duck → deer

Answer questions 2 and 3 based on the following energy pyramid. Wombats are classified as herbivores because they can

• obtain energy from the sun

• provide energy for kookaburras

• obtain nutrients from herbs and reeds

• provide nutrients for kangaroos

Answer questions 2 and 3 based on the following energy pyramid.

What term best describes wedge-tailed eagles?

• producer

• parasite

• carnivore

• decomposer

Each level of the pyramid decreases in ______ and _____ from ________ to _______.

This means

• energy & number of organisms from top to bottom

• energy & number of organisms from bottom to top

The attached diagram shows a food chain.

Grasses → Rabbits → Lynxes.

If the lynx population decreases, what is the most likely long-term effect on the rabbit population?

• only increase.

• only decrease.

• Will increase and then decrease.

• Will decrease and then increase.

Energy from nutrients is transferred to ATP in

• Level A, only

• Levels B and C, only

• Levels B, C and D, only

• Levels A, B, C and D

What relationship best describes the interactions between lettuce and a rabbit?

• predator - prey

• producer - consumer

• parasite - host

• decomposer - scavenger

The elimination of almost all predators from an ecosystem would likely result in

• an increase in the number of carnivorous species

• a decrease in new predators migrating to the ecosystem

• a decrease in the size of decomposers

• an increase in the number of herbivores

The attached diagram represents a model of a food pyramid. Which statement best describes what happens in this food pyramid?

• More organisms die at higher levels than at lower levels, resulting in less mass at higher levels.

• Energy is lost to the environment at each level, so less mass can be supported at each higher level.

• When organisms die at higher levels, their remains sink to lower levels, increasing the mass of the lower levels.

• Organisms decompose at each level, and therefore less mass can be supported at successively higher levels.

Which of the following statements is NOT true regarding fermentation?

• Fermentation is an aerobic process.

• Fermentation is an anaerobic process.

• Fermentation is an inefficient process.

• Fermentation includes alcoholic fermentation and lactic fermentation.