Tag: ecosystem : structure and function

Quizzes (14) Questions (61)

Questions Related to ecosystem : structure and function

Multiple choice biology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

Which statement is not correct?

  1. Humification is followed by mineralization

  2. Low temperature and anaeobiosis accelerate decomposition

  3. The decomposition is slow if the detritus is rich in lignin and chitin

  4. Humus is highly resistance to microbial action
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement B is incorrect because low temperatures and anaerobiosis inhibit or slow down decomposition rather than accelerate it. Warm, moist, and aerobic conditions favor rapid microbial decomposition. The other statements regarding humification, lignin-rich detritus, and humus resistance are correct.

Multiple choice biology ecosystem : structure and function biogeochemical cycles - sedimentary biogeochemical cycle nitrogen and phosphorus cycles

Which one of the following pairs is not correctly matched?

  1. Production of sulphur dioxide - Burning of coal

  2. Depletion of ozone layer - Release of chlorofluorocarbons in the atmosphere

  3. Eutrophication - Increase in nitrogen and phosphorus contents in aquatic bodies

  4. Dec:ease in B.O.D. of pond water - Increase in global temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Multiple choice botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

The pyramid of energy is always upright for any ecosystem. This situation indicates the fact that?

  1. Producers have the lowest energy conversion efficiency

  2. Carnivores have a better energy conversion efficiency than herbivores

  3. Energy conversion efficiency is the same in all trophic levels

  4. Herbivores have a better energy conversion efficiency than carnivores
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pyramid of energy is always upright because energy is lost as heat at each transfer, and producers have the highest energy availability, which decreases as you move up the trophic levels.

Multiple choice botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

Organism in estuary can concentrate on conversion of sun energy into;

  1. Food

  2. Organic matters

  3. Nutrients

  4. Water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Organisms in an estuary, particularly producers like phytoplankton and algae, convert solar energy into organic matter through photosynthesis. This organic matter forms the base of the estuarine food web.

Multiple choice botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

According to first law, energy cannot be created nor destroyed, but, can only show a state known as

  1. Utilized

  2. Thermodynamics

  3. Convection

  4. Conversion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The first law of thermodynamics states that energy is conserved; it can be converted from one form to another but cannot be created or destroyed. The process of changing energy from one form to another is called conversion.