Bio

To which trophic level do the butterflies belong?

• producer

• primary consumer

• secondary consumer

• tertiary consumer

How many trophic levels are in this food web ?

• 2

• 3

• 4

• 5

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

How is energy passed from one trophic level to the next ?

i) Food

ii) Light

iii) Heat

• i

• i and ii

• ii and iii

• i, ii and iii

Tags

NGSS.MS-LS2-3

The energy passing from the detritivores to the predatory invertebrates in this food web is 14000 kJ m-2 year-1. Approximately how much energy (in KJ m-2 year-1) passes from the predatory invertebrates to the carnivores?

• 140

• 1400

• 14000

• 140 000

Tags

NGSS.MS-LS2-3

Explain how the flow of energy in the food web differs from the movement of nutrients

• Nutrients are not recycled

• Nutrients decrease as trophic level increases while energy does not

• Nutrients are recycled while energy is dispersed as heat

• All the statements above

Tags

NGSS.MS-LS2-3

Why do food chains in ecosystem rarely contain more than five organism ?

• Nutrients are recycled by the decomposers back to the producer

• Nutrients are lost from the ecosystem when organisms die

• the conversion of food into growth by an organism is not very efficient

• energy is recycled by the decomposers back to the producers

Tags

NGSS.MS-LS2-3

What are the units of a pyramid energy ?

• kJ m^-2 year^-1

• kJ m^-4 year^-1

• J m^-3 year^-1

• J m² year^-1

How is energy lost between each trophic level ?

• photosynthesis, birth of an organism and digestion

• respiration, death of organism and egestion

• recycling of nutrients, death of organism and egestion

• respiration, birth of organism and digestion

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How much energy is consumed by the tertiary consumer ?

• 8

• 7.5

• 6.5

• 5

Tags

NGSS.MS-LS2-3

At each trophic level, energy is lost. How this energy regained by ecosystem ?

• Heat

• Nutrients

• Recycling

• Photosynthesis

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3