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300 questions in this collection · Page 6 of 30
Question 51 of 300
📘 CLASS XI
Biological Classification
According to the Five Kingdom Classification, what is the composition of the cell wall in Kingdom Monera?
According to NCERT, the moneran cell wall is non-cellulosic and composed of polysaccharides and amino acids.
Question 52 of 300
📘 CLASS XI
Biological Classification
The three-domain system of classification divides Kingdom Monera into two domains, resulting in a total of how many kingdoms?
The three-domain concept effectively results in a six-kingdom classification by splitting Monera.
Question 53 of 300
📘 CLASS XI
Biological Classification
In early classification systems, Chlamydomonas and Spirogyra were grouped together under algae. What fundamental structural difference between them did this classification fail to recognise?
Chlamydomonas is unicellular whereas Spirogyra is multicellular, a distinction ignored in early systems.
Question 54 of 300
📘 CLASS XI
Biological Classification
Which group of bacteria plays a significant role in recycling nutrients by oxidising inorganic substances like nitrates, nitrites and ammonia to produce ATP?
Chemosynthetic autotrophic bacteria obtain energy by oxidising inorganic compounds and recycle nutrients.
Question 55 of 300
📘 CLASS XI
Biological Classification
Heterotrophic bacteria are the most abundant in nature. What is the primary ecological role of the majority of these bacteria?
Most heterotrophic bacteria function as decomposers of dead organic matter.
Question 56 of 300
📘 CLASS XI
Biological Classification
How do bacteria generally ensure survival when faced with unfavourable environmental conditions?
Many bacteria produce resistant spores to survive adverse environmental conditions.
Question 57 of 300
📘 CLASS XI
Biological Classification
Why is diatomaceous earth, which accumulates over billions of years, widely used in polishing and the filtration of oils and syrups?
Diatomaceous earth consists of silica-rich diatom shells, making it abrasive and useful in polishing and filtration.
Question 58 of 300
📘 CLASS XI
Biological Classification
Which of the following correctly describes the arrangement of flagella in most dinoflagellates?
Most dinoflagellates possess two flagella arranged longitudinally and transversely.
Question 59 of 300
📘 CLASS XI
Biological Classification
How are the extremely resistant spores produced by the fruiting bodies of slime moulds dispersed?
Slime mould spores are dispersed by air currents.
Question 60 of 300
📘 CLASS XI
Biological Classification
Which of the following amoeboid protozoans possess protective silica shells on their surface?