Class 11 Biology chapter 2 Systematics of Living Organisms solutions

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Class 11 Biology textbook Solutions for Class 11, Biology  Chapter 2  Systematics of Living Organisms maharashtra state board are provided here with simple step-by-step  detailed explanations. These solutions for Systematics of Living Organisms are very popular among Class 11 students for biology chapter 2 Systematics of Living Organisms  Solutions come handy for quickly completing your homework and preparing for compititive exams like NEET, CET abd verious medical entrance examination also. All questions and answers are taken from the class 11 Biology textbook, Bjology Textbook Solutions of Class  11 Biology Chapter 2 are provided here for you for without any charge its free for you. All Biology textbook Solutions for class 11. Solutions for class 11 Biology subject, These biology textbook solutions are prepared by   experts in the field and are 100% accurate for you.

1. Choose correct option 
A. Which of the following shows single 
stranded RNA and lacks protein coat?
a. Bacteriophage 
b. Plant virus 
c. Viroid 
d. Animal virus

B. Causative agent of red tide is 
a. Dinoflagellate 
b. Euglenoid 
c. Chrysophyte 
d. Lichen

C. Select odd one out for Heterotrophic 
 a. Nitrogen fixing bacteria 
 b. Lactobacilli 
 c. Methanogens 
d. Antibiotic production

D. Paramoecium : Ciliated Protist 
Plasmodium : ____________
a. Amoeboid protozoan
b. Ciliophora 
c. Flagellate protozoan 
d. Sporozoan

2. Answer the following
A. What are the salient features of monera?
Answer : The essential features of Monera include being unicellular, microscopic, and lacking a nucleus or other membrane-bound organelles such as mitochondria.

salient features of kingdom monera
  1. Monera kingdom includes prokaryotic organisms.
  2. organisms of Monera do not contain membrane bound organelles.
  3. organisms of Monera lack nuclear envelope & DNA without histone such DNA known as Nucleoid or Genome.
  4. organisms of Monera may be autotrophic or heterotrophic but most of the members are heterotrophic.

B. What will be the shape of bacillus and 
coccus type of bacteria?
Answer : Cocci (or coccus for a single cell) are round cells, sometimes slightly flattened when they are adjacent to one another. Bacilli (or bacillus for a single cell) are rod-shaped bacteria. Spirilla (or spirillum for a single cell) are curved bacteria which can range from a gently curved shape to a corkscrew-like spiral.

C. Why is binomial nomenclature 
Answer : Binomial nomenclature is the system of naming all living organisms on planet Earth according to their scientific representations. It has two parts genus and epithet.
  1. It was important to name animals, plants or any other living organisms in such a way to prevent any confusion which was caused before.
  2. Binomial nomenclature is important because In this, each organism given a name containing genus and species which is constant all over the world.
  3. It is easy to identify and describe any organism by this name without any confusion.
  4. e.g, Mangifera indica is scientific name which is constant in all over world.

3. Write short notes
A. Useful and harmful bacteria.
Answer : Harmful activities of bacteria are as follows:
  1. Spoilage of food
  2. Food poisoning
  3. Deterioration of domestic articles
  4. Desulphurification of soils
  5. Denitrification of soils
  6. Diseases
  7. Water pollution
Human Uses of Bacteria
  1. Fermentation processes, such as brewing, baking, and cheese and butter manufacturing.
  2. Chemical manufacturing, such as the production of ethanol, acetone, organic acids, enzymes, and perfumes.
  3. Pharmaceuticals, such as the manufacture of antibiotics, vaccines, and steroids.

B. Five Kingdom system
Answer : R.H. Whittaker proposed the five kingdom classification in 1969. This classification was based upon certain characters like mode of nutrition, thallus organization, cell structure, phylogenetic relationships and reproduction.  This form of kingdom classification includes five kingdoms Monera, Protista, Fungi, Plantae and Animalia.

1. Kingdom Monera :
It contains unicellular organisms with 
prokaryotic cellular organization. Monera 
includes unicellular prokaryotic organisms. These are omnipresent. They are found in all types of environment which are not generally inhabited by other living beings. Few are photoautotrophs or chemoautotrophs; but majority are heterotrophic in nature. These 
organisms do not have well defined nucleus.

2. Kingdom Protista :
This group includes all the unicellular 
but eukaryotic organisms. These organisms show link with all eukaryotic Kingdoms like Plantae, Fungi and Animalia.

3. Kingdom Plantae
The kingdom is dominated by 
autotrophs. It also includes some semi-
autotrophic members, the insectivorous plants like Venus fly trap, pitcher plant, bladderwort, as well as heterotrophic parasitic members like Cuscuta. Members of this kingdom are multicellular, having eukaryotic cells containing chlorophyll. Cells have cell wall mostly made up of cellulose.

4. Kingdom Fungi : These are eukaryotic 
heterotrophs showing extracellular digestion. They are found in warm and humid places. They have simple body which may be unicellular or 
made up of long thread like structures called hyphae. Large fungi such as mushrooms have a compact mass of cells. Unicellular organisms have a protoplast with many nuclei. e.g. Rhizopus, Saccharomyces (Yeast-unicellular 

5. Kingdom Animalia : Members of this 
kingdom are heterotrophs; adapted to holozoic nutrition. Most of them have capacity of locomotion. They are multicellular eukaryotes where cells lack chlorophyll as well as cell wall. Growth is determinate (follow definite 

C. Useful Fungi
Answer : can be good to eat, like some mushrooms or foods made from yeast, like bread or soy sauce. Molds from fungi are used to make cheeses like Cashel blue or Roquefort! Scientists use fungi to make antibiotics, which doctors sometimes use to treat bacterial infections.

5. Draw neat labelled diagrams
A. Paramoecium

B. Euglena


8. The scientific name of sunflower is given below. Identify the correctly written name. 
 A. H elianthus annus
 B. H elianthus Annus
Answer : A

9. Match the following.
Kingdom.     Examples
i. Monera.     a. Lichen
ii. Protista.    b. Cyanobacteria
iii. Plantae.    c. Rhizopus
iv. Fungi .       d. Spirogyra
i. Monera ------------- b. Cyanobacteria.
ii. Protista ------------ c. Lichen.
iii. Plantae ------------ d. Spirogyra.
iv. Fungi --------------- a. Rhizopus.