Flow of matter and energy

Which of the following organisms can never be found on the first trophic level of a food chain?

• an algae

• a moss

• a lichen

• a tree

Name the process responsible for converting radiant energy (light) into biochemical energy.

• photosynthesis

• cellular respiration

• Combustion

• Decomposition

Tags

NGSS.MS-LS1-6

From one trophic level to the next, the energy decreases of a factor of:

• 1

• 10

• 100

• 1000

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the following food web, the python is...

• .. a secondary and a quaternary consumer

• .. a secondary and a tertiary consumer

• .. a tertiary consumer only

• .. a tertiary and a quaternary consumer

Tags

NGSS.MS-LS2-3

NPP (net primary productivity) represents the rate at which energy is stored as biomass by plants or other primary producers and made available to the consumers in the ecosystem.

What is the correct formula for calculating NPP?

• NPP = GPP - R

• NPP = GPP + R

• NPP = R / GPP

• NPP = R- GPP

Tags

NGSS.MS-LS1-6

Which of the following statements is NOT a reason why on average there is a 90% loss of energy from one trophic level to the next.

• Organisms use some of their energy to maintain their body temperature.

• Nutrients from food are stored in body tissues.

• Some of the food ingested cannot be digested

• Usually, consumers do not ingest the whole body of the organism they feed on.

Tags

NGSS.MS-LS2-3

What is the form of nitrogen most commonly taken up by plants?

• N2

• NH3

• NO2-

• NO3-

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What is the name of molecule NH4+?

• Ammonia

• Ammonium

• Amonia

• Amonium

Tags

NGSS.MS-PS1-1

What is the name of the process during which, the nitrogen contained in the proteins and nucleic acid of dead organisms is returned back to the soil?

• Nitrogen fixation

• Denitrification

• Ammonification

• Nitrification

A mouse containing 12364 kJ of energy is eaten by a cat. How much energy will the cat gain?

• 1 236.4 kJ

• 123.64 kJ

• 11127.6 kJ

• 12364 kJ

Tags

NGSS.MS-LS2-3

NGSS.MS-PS3-5