In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Downloads of CBSE Class 11 Biology Chapter 2 Case Study and Passage-Based Questions with Answers were Prepared Based on the Latest Exam Pattern. Students can solve Class 11 Biology Case Study Questions Biological Classification to know their preparation level.
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In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Biological Classification Case Study Questions With Answers
Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 2 Biological Classification
Case Study/Passage-Based Questions
Case Study 1: Phycomycetes – Members of Phycomycetes are found in aquatic habitats and on decaying wood in moist and damp places or as obligate parasites on plants. The mycelium is aseptate and coenocytic. Asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile). These spores are endogenously produced in sporangium. A zygospore is formed by the fusion of two gametes. These gametes are similar in morphology (isogamous) or dissimilar (anisogamous or oogamous). Some common examples are Mucor, Rhizopus (the bread mold), and Albugo (the parasitic fungi on mustard).
Ascomycetes – Commonly known as sac-fungi, the ascomycetes are mostly multicellular, e.g., Penicillium, or rarely unicellular, e.g., yeast (Saccharomyces). They are saprophytic, decomposers, parasitic or coprophilous (growing on dung). Mycelium is branched and septate. The asexual spores are conidia produced exogenously on the special mycelium called conidiophores. Conidia on germination produce mycelium. Sexual spores are called ascospores which are produced endogenously in sac like asci (singular ascus). These asci are arranged in different types of fruiting bodies called ascocarps. Some examples are Aspergillus, Claviceps, and Neurospora. Neurospora is used extensively in biochemical and genetic work. Many members like morels and truffles are edible and are considered delicacies.
Basidiomycetes –Commonly known forms of basidiomycetes are mushrooms, bracket fungi, or puffballs. They grow in soil, on logs and tree stumps, and in living plant bodies as parasites, e.g., rusts and smuts. The mycelium is branched and septate. The asexual spores are generally not found, but vegetative reproduction by fragmentation is common. The sex organs are absent, but plasmogamy is brought about by the fusion of two vegetative or somatic cells of different strains or genotypes. The resultant structure is dikaryotic which ultimately gives rise to basidium. Karyogamy and meiosis take place in the basidium producing four basidiospores. The basidiospores are exogenously produced on the basidium (pl.: basidia). The basidia are arranged in fruiting bodies called basidiocarps. Some common members are Agaricus (mushroom), Ustilago (smut), and Puccinia (rust fungus).
(1) The bread mould fungi belong to _______________
- (a) Basidiomycetes
- (b) Phycomycetes
- (c) Ascomycetes
- (d) Deuteromycetes
Answer:(b) Phycomycetes
(2) Ascomycetes fungi are characterised by presence of ____________.
- (a) Presence of asci
- (b) Presence of Basidium
- (c) Mycelium without septa
- (d) Both a and c
Ans: (a) Presence of asci
Which group of fungi is commonly referred to as sac-fungi?
A) Phycomycetes
B) Ascomycetes
C) Basidiomycetes
D) None of the above
Answer: B
In which group of fungi does the mycelium exist as aseptate and coenocytic?
A) Ascomycetes
B) Basidiomycetes
C) Phycomycetes
D) All of the above
Answer: C
Which fungal group includes mushrooms, bracket fungi, or puffballs?
A) Phycomycetes
B) Ascomycetes
C) Basidiomycetes
D) None of the above
Answer: C
What kind of spores are produced exogenously in the special mycelium called conidiophores?
A) Zoospores
B) Ascospores
C) Conidia
D) Basidiospores
Answer: C
Which group of fungi commonly grow on decaying wood in moist and damp places?
A) Ascomycetes
B) Basidiomycetes
C) Phycomycetes
D) Both A and C
Answer: C
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