Biology Class 11th Chapter 1 mcqs

1. Two taxonomic species are distinguished from each other by

(a) their failure to interbreed

(b) their ability to exchange gene freely

(c) their similarity in morphological characters

(d) discontinuity in a set of correlated characters

Answer: (a) their failure to interbreed

2. Musca domestica is common name of

(a) Housefly

(b) Mosquito

(c) Snail

(d) Ant

Answer: (a) Housefly

3. Keystone species are

(a) important for ecosystem

(b) important for plants

(c) endangered species

(d) extinct species

Answer: (a) important for ecosystem

4. The study of fish culture is called

(a) ophiology

(b) herpetology

(c) ichthyology

(d) pisciculture

Answer: (d) pisciculture

5. National Botanical Research Institute is located in

(a) Shimla

(b) Dehradun

(c) Howrah

(d) Lucknow

Answer: (d) Lucknow

6. Biosystematics aims at

(a) Identification and arrangement of organisms on the basis of cytological characteristics

(b) The classification of organisms based on broad morphological characters

(c) Delimiting various taxa of organism and establishing their relationships

(d) The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies

Answer: (d) The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies

7. In angiosperm, characters of flowers are used in classification because

(a) Flowers are attractive

(b) Flowers are large

(c) Characters of flowers are conservative

(d) None of the above

Answer: (c) Characters of flowers are conservative

8. Scientific name of plants are given by

(a) International code for Botanical nomenclature

(b) International code for biological plants

(c) Indian code for Botanical nomenclature

(d) International code for zoological nomenclature

Answer: (a) International code for Botanical nomenclature

9. A system which gets a continuous flow of energy is called

(a) micropropagated system

(b) closed system

(c) open system

(d) steady state

Answer: (c) open system

10. Solanum, Panthera, Homo are examples of

(a) Family

(b) Division

(c) Genera

(d) Species epithet

Answer: (c) Genera

11. Which of the following is correct?

(a) Musca domestica Order – Diptera Family – Muscidae Phylum – Arthropoda

(b) Mangifera indica Order – Sapindales Family – Anacardiaceae Phylum –Gymnospermae

(c) Triticum aestivum Order – Poles Family – Monocotyledons Phylum – Angiospermae

(d) Panthera leo Order – leo Family – Felidae Phylum – Mammalia

Answer: (a) Musca domestica Order – Diptera Family – Muscidae Phylum –

12. Binomial Nomenclature was given by

(a) Ernst Mayr

(b) Alexander Agassiz

(c) Carolus Linnaeus

(d) Alexander Agassiz and Carlous Linnaeus

Answer: (c) Carolus Linnaeus

13. Systematics deals with

(a) Nomenclature of new organisms

(b) Evolutionary relationship between organisms

(c) Identification of newly discovered organisms

(d) All of these

Answer: (d) All of these

14. Which of the following shows maximum diversity?

(a) Plantas

(b) Animalia

(c) Monerans

(d) Protistans

Answer: (b) Animalia

15. Which of the following does not come under taxon?

(a) Species

(b) Kingdom

(c) Division

(d) Key

Answer: (d) Key

16. The ozone layer is found in the

(a) hydrosphere

(b) stratosphere

(c) lithosphere

(d) troposphere

Answer: (b) stratosphere

17. Taxonomic studies depends on

(a) Ecological information of organisms.

(b) Structure of cell and development process of organisms.

(c) External and internal structure of organisms.

(d) All of the above.

Answer: (d) All of the above.

18. Wheat belongs to division ______.

(a) Angiospermae

(b) Gymnospermae

(c) Poacae

(d) None of the above

Answer: (a) Angiospermae