IB Biology Topic 5

In a forest ecosystem, a food chain might look like this:
green plants → rabbit → fox → panther

If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?

• There would be fewer rabbits for the foxes to eat. 

• The panthers would have to begin to eat green plants.

• There would be an increase in the fox population

• There would be more green plants for the rabbits to eat

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NGSS.HS-LS2-6

NGSS.HS-LS4-5

At which trophic level can you find an herbivore?

• 1st Level

• 2nd Level

• 3rd Level

• 4th Level

Why are decomposers necessary?

• Because we compose too much...

• To take basic materials and make them more complex...

• To take complex materials and break them down to basic stuff...

• So demusic can be really good...

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NGSS.MS-LS2-3

__________ primary productivity is the total amount of energy that producers convert to chemical energy in organic molecules per unit of time.   

• Net

• Total

• Gross

• None of the above

To measure primary productivity, you can measure carbon dioxide consumption, total carbohydrates produced or ________________.

• dissolved oxygen

• total proteins produced

• light energy entering system

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NGSS.HS-LS1-5

NGSS.HS-LS2-5

__________productivity = the organic materials that remain after photosynthetic organisms in the ecosystem have used some of these compounds for their cellular energy needs (cellular respiration).

• Gross

• Primary

• Net

• Secondary

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NGSS.HS-LS2-5

The rate at which producers convert radiant energy into chemical energy

• trophic level

• net primary productivity

• gross primary productivity

• photosynthesis

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NGSS.HS-LS1-5

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show what direction the energy is flowing between organisms. 

• They represent how water is transferred within a habitat.

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NGSS.MS-LS2-3

All of the production by photosynthetic organisms in a defined area over a specified time period is known as

• Gross Productivity

• Net Productivity

• Photosynthesis + Respiration

• Photosynthesis - Respiration

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NGSS.HS-LS2-5

Which of the following is an appropriate unit of primary productivity

• kg/m2

• kg/m/day

• kJ/m2

• kg/m2/yr

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NGSS.HS-LS1-5

NGSS.HS-LS2-5