Efficiency of Biomass Transfer in Trophic Levels

The video discusses the efficiency of biomass transfer between trophic levels, using a zebra and lion example. It explains why biomass transfer is less than 100% due to factors like incomplete ingestion, energy use in respiration, and waste excretion. Calculations show 11% efficiency from grass to zebra and 13% from zebra to lion. The video concludes with a summary of these factors.

What is the efficiency of biomass transfer from grass to zebras in the given example?

• 11%

• 15%

• 20%

• 8%

Which of the following is NOT a reason for the low efficiency of biomass transfer from grass to zebras?

• Energy used for respiration

• Egestion of undigested parts

• Roots left in the ground

• Complete digestion of all grass

What percentage of biomass transfer efficiency is observed from zebras to lions?

• 13%

• 18%

• 25%

• 10%

Which factor contributes to the low efficiency of biomass transfer from zebras to lions?

• Complete ingestion of zebra biomass

• Energy used for respiration

• No energy loss during transfer

• All parts of zebra are digested

What happens to excess amino acids in both zebras and lions?

• They are converted to glucose

• They are used for energy

• They are stored as fat

• They form urea and are excreted