Science (English Medium) Class 11 - CBSE Question Bank Solutions

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Why are living organisms classified?

[0.01] The Living World
Chapter: [0.01] The Living World
Concept: What is ‘Living’?

What do we learn from identification of individuals and populations?

[0.01] The Living World
Chapter: [0.01] The Living World
Concept: What is ‘Living’?

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How is a key helpful in the identification and classification of an organism?

[0.01] The Living World
Chapter: [0.01] The Living World
Concept: What is ‘Living’?

Plants are autotrophic. Can you think of some plants that are partially heterotrophic?

[0.03] Plant Kingdom
Chapter: [0.03] Plant Kingdom
Concept: Kingdom Plantae

Match the following (column I with column II):

  Column I   Column II
(a) Chlamydomonas (i) Moss
(b) Cycas (ii) Pteridophyte
(c) Selaginella (iii) Algae
(d) Sphagnum (iv) Gymnosperm
[0.03] Plant Kingdom
Chapter: [0.03] Plant Kingdom
Concept: Kingdom Plantae

What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?

[0.04] Animal Kingdom
Chapter: [0.04] Animal Kingdom
Concept: Kingdom Animalia

Match the following: 

  Column I   Column II
(a) Operculum (i) Ctenophora
(b) Parapodia (ii) Mollusca
(c) Scales (iii) Porifera
(d) Comb plates (iv) Reptilia
(e) Radula (v) Annelida
(f) Hairs (vi) Cyclostomata
and Chondrichthyes
(g) Choanocytes (vii) Mammalia
(h) Gill slits (viii) Osteichthyes
[0.04] Animal Kingdom
Chapter: [0.04] Animal Kingdom
Concept: Kingdom Animalia

Prepare a list of some animals that are found parasitic on human beings.

[0.04] Animal Kingdom
Chapter: [0.04] Animal Kingdom
Concept: Kingdom Animalia

Name the three basic tissue systems in the flowering plants. Give the tissue names under each system

[0.06] Anatomy of Flowering Plants
Chapter: [0.06] Anatomy of Flowering Plants
Concept: Anatomy and Functions of Different Parts of Flowering Plants

How is the study of plant anatomy useful to us?

[0.06] Anatomy of Flowering Plants
Chapter: [0.06] Anatomy of Flowering Plants
Concept: Anatomy and Functions of Different Parts of Flowering Plants

Mark the odd one in each series:

(a) Areolar tissue; blood; neuron; tendon

(b) RBC; WBC; platelets; cartilage

(c) Exocrine; endocrine; salivary gland; ligament

(d) Maxilla; mandible; labrum; antennae

(e) Protonema; mesothorax; metathorax; coxa

[0.07] Structural Organisation in Animals
Chapter: [0.07] Structural Organisation in Animals
Concept: Introduction of Structural Organisation in Animals

Match the terms in column with those in column II:

  Column I   Column II
a Compound epithelium 1 Alimentry canal
b Compound eye 2 Cockroach
c Septal nephridia 3 Skin
d Open circulatory system 4 Mosaic vision
e Typhlosole 5 Earthworm
f Osteocytes 6 Phallomere
g Genitalia 7 Bone
[0.07] Structural Organisation in Animals
Chapter: [0.07] Structural Organisation in Animals
Concept: Introduction of Structural Organisation in Animals

Which of the following is not correct?

[0.08] Cell : the Unit of Life
Chapter: [0.08] Cell : the Unit of Life
Concept: Cell: the Fundamental Unit of Life

Cell is the basic unit of life. Discuss in brief.

[0.08] Cell : the Unit of Life
Chapter: [0.08] Cell : the Unit of Life
Concept: Cell: the Fundamental Unit of Life

Explain the composition of triglyceride.

[0.09] Biomolecules
Chapter: [0.09] Biomolecules
Concept: How to Analyse Chemical Composition?

Can you attempt building models of biomolecules using commercially available atomic models (Ball and Stick models).

[0.09] Biomolecules
Chapter: [0.09] Biomolecules
Concept: How to Analyse Chemical Composition?

Attempt titrating an amino acid against a weak base and discover the number of dissociating ( ionizable ) functional groups in the amino acid.

[0.09] Biomolecules
Chapter: [0.09] Biomolecules
Concept: How to Analyse Chemical Composition?

Draw the structure of the amino acid, alanine

[0.09] Biomolecules
Chapter: [0.09] Biomolecules
Concept: How to Analyse Chemical Composition?

Discuss with your teacher about haploid insects and lower plants where cell-division occurs.

[0.1] Cell Cycle and Cell Division
Chapter: [0.1] Cell Cycle and Cell Division
Concept: Introduction of Cell Division

Discuss with your teacher about some haploid cells in higher plants where cell-division does not occur.

[0.1] Cell Cycle and Cell Division
Chapter: [0.1] Cell Cycle and Cell Division
Concept: Introduction of Cell Division
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