Class XI · Biology practice

Biological Classification MCQs

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300 questions in this collection · Page 14 of 30

Question 131 of 300

📘 CLASS XI

Biological Classification

Which of the following fungi causes 'rust' disease in plants?

Puccinia is a basidiomycete commonly known as a rust fungus that parasitises living plants.

Question 132 of 300

📘 CLASS XI

Biological Classification

Deuteromycetes are called "imperfect fungi" because:

Only the asexual or vegetative phase of Deuteromycetes is known; therefore they are called imperfect fungi.

Question 133 of 300

📘 CLASS XI

Biological Classification

When the sexual (perfect) stages of Deuteromycetes are discovered, they are most often moved into which classes?

After discovery of the sexual stage, members of Deuteromycetes are usually transferred to Ascomycetes or Basidiomycetes.

Question 134 of 300

📘 CLASS XI

Biological Classification

Alternaria, Colletotrichum, and Trichoderma are examples of:

Alternaria, Colletotrichum and Trichoderma are classical examples of Deuteromycetes.

Question 135 of 300

📘 CLASS XI

Biological Classification

Bladderwort and the Venus fly trap belong to Kingdom Plantae but exhibit which unique nutritional feature?

Bladderwort and Venus fly trap are insectivorous plants and are considered partially heterotrophic.

Question 136 of 300

📘 CLASS XI

Biological Classification

The phenomenon where the diploid sporophytic and haploid gametophytic phases alternate with each other in plants is termed:

Plants show alternation of generations involving diploid sporophytic and haploid gametophytic phases.

Question 137 of 300

📘 CLASS XI

Biological Classification

Members of Kingdom Animalia lack cell walls and primarily store their food reserves as:

Animals store reserve food mainly as glycogen or fat.

Question 138 of 300

📘 CLASS XI

Biological Classification

Why were viruses, viroids, and prions excluded from Whittaker's five kingdom classification?

These infectious agents are acellular and therefore are not included in Whittaker's five kingdom classification.

Question 139 of 300

📘 CLASS XI

Biological Classification

Who first recognized the causal organism of tobacco mosaic disease in 1892, noting they were smaller than bacteria?

Dmitri Ivanowsky demonstrated that the infectious agent passed through bacteria-proof filters.

Question 140 of 300

📘 CLASS XI

Biological Classification

The phrase Contagium vivum fluidum (infectious living fluid) to describe viruses was coined by:

M.W. Beijerinck demonstrated that the infectious extract behaved as Contagium vivum fluidum.

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