Tag: ecosystem

Quizzes (20) Questions (95)

Questions Related to ecosystem

Multiple choice botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

Leaves appear green because they

  1. Reflect green light

  2. Absorb green light

  3. Both reflect and absorb green light

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Chlorophyll which is the abundant plant pigment absorbs red and blue light making it photosynthetically efficient. The green wavelengths are reflected giving leaves the green colour. Thus, green is the photosynthetically least efficient wavelength. 
Multiple choice botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

Choose the correct answers from the alternatives given .
ATP is considered a high-energy compound because under cellular conditions, 7.3 kcal per mole of energy is released when a bond is broken between the

  1. base adenine and the sugar ribose

  2. adenosine and the phosphate groups

  3. base adenine and the phosphate groups

  4. adenosine diphosphate and the third phosphate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Energy is stored in the covalent bonds between each phosphate group which makes up the tail of the molecule. The last phosphate bond holds the most energy (approx. 7.3 kcal/mole). It is called the pyrophosphate bond. In order to release it's energy to the body, ATP breaks down into ADP [Adenosine Diphosphate(2 phosphates)] and an inorganic phosphate group and releases energy from the pyrophosphate bond.

So, the correct option is 'Adenosine diphosphate and the third phosphate'.

Multiple choice botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

Photosynthetically active radiation (PAR) represents which of the following range of wave length?

  1. 400 - 700 nm

  2. 500 - 600 nm

  3. 450 - 950 nm

  4. 340 - 450 nm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Photosynthetically active radiation, often abbreviated PAR, designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers, that photosynthetic organisms are able to use in the process of photosynthesis. This spectral region corresponds more or less with the range of light visible to the human eye.

Multiple choice zoology ecosystem decomposition in ecosystem ecosystem productivity and decomposition producers, consumers and decomposers

During the process of decomposition in which stage complex organic matter convert into inorganic ions and salts by fungi?

  1. Mineralisation

  2. Catabolism

  3. Fragmentation

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mineralisation is a process in which complex organic matter present in humus is converted into inorganic salts and ions. It is done by the action of saprophytic fungi.