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Published on: 29/05/2021
QB365 Provides the HOT Question Papers for Class 11 Biology, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams
Download CBSE Class 11th Standard CBSE Biology question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Biology
Questions + Answers key
Take MCQ Biology Test1.
Polluted water bodies have usually very high abundance of plants like Nostoc and Oscillatoria. Give reasons.
2.
Mention any two cellular structures absent in kingdom-Animalia of four Kingdom classification system of organisms that are present in kingdom-Protista.
3.
In which kingdom of five kingdom classification, nuclear membrane is not present?
4.
Why the pseudoparenchyma fungal tissue is called false parenchyma?
5.
How the saprotrophic Basidiomycetes are able to decompose plant matter?
1.
Polluted water bodies (Ponds, ditches and rivers etc.) have usually nutrient contents (such as nitrate, phosphates) domestic sewage primarily contains biodegradable organic matter. Presence of large amount of nutrients in waters also causes excessive growth of Planktonic (free floating algae) called an algal bloom, which imparts a distinct colour to water bodies. Algal bloom causes deterioration of the water quality and fish mortality. Some bloom forming algae mainly Nostoc and Oscillitoria are extremely toxic to human beings and animals.
2.
Cell wall and chloroplasts are absent in cells of members of Kingdom-Animalia.
3.
Bacteria are prokaryotes which belong to kingdom Monera. Monerans do not have nuclear membrane enclosing the nucleus of the cell.
4.
This is because pseudoparenchyma is formed by close packing and fusion of hyphae. Individual hyphae are not distinguishable.
5.
The saprotrophic Basidiomycetes can decompose plant matter because they have enzymes for metabolising both cellulose and lignin.
11th Standard CBSE Syllabus & Materials
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