Year 9 Ecology Review

According to the food web, which of the following organisms can be classified into more than one trophic level? 

• grasshopper
• owl
• rabbit
• frog

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

What's missing from the food web?

• decomposers
• producers
• consumers
• autotrophs

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

Which of the following correctly lists the flow of matter in the food web above? 

• plants, animals, nematodes, arthropods
• animals, nematodes, arthropods, plants
• plants, nematodes, arthropods, animals
• nematodes, plants, arthropods, animals

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

Sharks are hunted for their fins for use in shark fin soup, a specialty food item in Asia. Sharks grow slowly and take years to reproduce, which makes them vulnerable to overfishing. If overfishing of sharks is not reduced, sharks may become endangered in the next few years.  What would occur to the Pacific Ocean fish population if their natural predator, sharks, are overfished? 

• overpopulation
• extinction
• migration
• adaptation

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Based on the food web shown above, which of the following is most likely responsible for the rabbit population trend as shown in the graph? 

• increase in amount of grass
• decrease in amount of grass
• overpopulation in squirrel population
• increase in rabbit population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which statement is true for all of the organisms in the ecosystem represented in the diagram below?

• They use energy to combine the inorganic molecules carbon dioxide and water into energy-rich organic compounds.
• Stored energy cannot be used by these organisms as a source of energy for life processes.
• Energy stored in inorganic molecules is released during cellular respiration in these organisms.
• Energy is used by the organisms to obtain and transport materials, and to eliminate wastes.Listen

The best explanation for the decrease in the amount of energy transferred to each succeeding level is that much of the energy is

• consumed by predators
• released as heat
• stored within inorganic materials
• used in photosynthesis

The activity taking place is

• photosynthesis
• differentiation
• autotrophic nutrition
• heterotrophic nutrition

Base your answer to the question on the energy pyramid below and on your knowledge of biology.
Letter A in the pyramid represents

• scavengers
• producers
• carnivores
• herbivores

What do the arrows in the diagram represent?

• an increase in population
• the evolution of organisms
• the flow of energy
• ecological succession