ECOLOGY
ECOSYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Organisms find it difficult to find enough food.
|
|
|
Biomass increases up the food chain
|
|
|
Not all parts of an organism are edible.
|
|
|
Producers are slow at photosynthesis
|
Detailed explanation-1: -Why is energy transfer inefficient? There are several reasons. One is that not all the organisms at a lower trophic level get eaten by those at a higher trophic level. Another is that some molecules in the bodies of organisms that do get eaten are not digestible by predators and are lost in the predators’ feces (poop).
Detailed explanation-2: -The Food chain Energy from the sun enters most food chains when green plants absorb sunlight to photosynthesise. Biomass for the Earth is produced by photosynthetic and chemosynthetic organisms. This energy and biomass is passed along the food chain from one organism to the next by feeding.
Detailed explanation-3: -Only around 10% of the biomass is transferred. 90% is lost through life processes. This includes excretion of undigested material as faces, respiration giving out carbon dioxide and loss of urea in urine. Respiration uses a huge amount of glucose and so a lot of the biomass is lost here.
Detailed explanation-4: -With less energy at higher trophic levels, there are usually fewer organisms a s well . Organisms tend to be larger in size at higher trophic levels, but their smaller numbers result in less biomass. Biomass is the total mass of organisms at a trophic level.