Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes: Overview
This topic covers various concepts like Resting Spore, , etc.
Important Questions on Cycles of Matter and Energy Transfer in Ecosystems - Photosynthesis and cellular respiration (including anaerobic processes) provide most of the energy for life processes
Which of the following is the given ecological pyramid?
Arrange the following communities in the order of their appearances:
Seral, pioneer, climax
Which out of detritus food chain and grazing food begins with plants:
Blue–green algae belong to
A scorpion stalks, kills, and then eats a spider. Based on its behaviour, which ecological terms describe the scorpion?
Given below is one of the types of ecological pyramids.
This type represents:
Mr. X is eating curd/yoghurt. For this food intake in a food chain Mr. X should be considered as occupying
The main role of bacteria in the carbon cycle involves –
Temperature tolerance of thermal blue-green algae is due to –
Complex metabolic diversity is observed in
Identify the correct statement:
A. Detrivores perform fragmentation.
B. The humus is further degraded by some microbes during mineralisation.
C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.
D. The detritus food chain begins with living organism.
E. Earthworms break down detritus into smaller particles by a process called catabolism.
Choose the correct answer from the options given below:
Read the following statements and select the correct option:
Statement A: Humus is highly resistant to microbial action and undergoes decomposition at extremely fast rate.
Statement B: The humus is further degraded by some microbes and release of inorganic nutrients occurs by mineralisation.
Do all cyanobacteria form heterocysts ?
Marshy areas often consist of hard outer coverings as detritus that are remains of organisms such as crabs. State TWO reasons why decomposition would be limited in such areas.
Biomass is expressed in terms of dry weight and / or fresh weight. Which of the weights is more accurate as a unit of standing crop? Justify your answer with a reason.
A stable community is usually resistant to invasion by alien species. Which of the following would NOT be affected in a stable community due to this resistance?
Which of the following is most likely to be true about the percentage of energy received by a horse and a crow from the producers in different food chains?
| Horse | Crow | |
| 1. | always the same | always the same |
| 2. | always the same | can be different |
| 3. | can be different | always the same |
| 4. | can be different | can be different |
Given below is a food web representative of the Arctic region.
Increasing temperatures have been causing changes in the ocean ecosystem. These changes have caused the population of Arctic cod to decline rapidly.
Which of the following statement/s is/are most likely to be TRUE based on this information?
P) The population of arctic birds will increase.
Q) The ringed seal will slowly become extinct.
R) The harbour seal will be dependent on capelins alone.
A substrate is the surface on which an organism lives or survives on.
Which of the following acts as the substrate that provides energy in a detritus food chain?
Which of the following is not correctly matched ?
