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

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Biology
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What would be expected to happen if you forgot to add cytokinin to the culture medium?

[13] Plant Growth and Development
Chapter: [13] Plant Growth and Development
Concept: undefined >> undefined

Match the following:

  Column I   Column II
(a) T4 (i) Hypothalamus
(b) PTH (ii) Thyroid
(c) GnRH (iii) Pituitary
(d) LH (iv) Parathyroid
[19] Chemical Coordination and Integration
Chapter: [19] Chemical Coordination and Integration
Concept: undefined >> undefined

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Protein-free fluid is filtered from blood plasma into the Bowman’s capsule.

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Henle’s loop plays an important role in concentrating the urine.

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Glucose is actively reabsorbed in the proximal convoluted tubule.

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Match the items of column I with those of column II:

  Column I   Column II
(a) Ammonotelism (i) Birds
(b) Bowman’s capsule (ii) Bowman’s capsule
(c) Micturition (iii) Bony fish
(d) Uricotelism (iv) Urinary bladder
(e) ADH (v) Renal tubule
[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Name the following: 

A chordate animal having flame cells as excretory structures

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Name the following: 

Cortical portions projecting between the medullary pyramids in the human kidney.

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Name the following: 

A loop of capillary running parallel to the Henle’s loop

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Ascending limb of Henle’s loop is ______ to water, whereas the descending limb is ______to it.

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

A healthy adult human excretes (on an average) _______ gm of urea/day.

[16] Excretory Products and Their Elimination
Chapter: [16] Excretory Products and Their Elimination
Concept: undefined >> undefined

Match Column I with Column II:

  Column I   Column II
(a) Smooth muscle (i) Myoglobin
(b) Tropomyosin (ii) Thin filament
(c) Red muscle (iii) Sutures
(d) Skull (iv) Involuntary
[17] Locomotion and Movement
Chapter: [17] Locomotion and Movement
Concept: undefined >> undefined

Briefly describe the structure of the Brain.

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Briefly describe the Given structure - Eye

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Briefly describe the Given structure - Ear

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Compare the following:

Central neural system (CNS) and Peripheral neural system (PNS)

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Explain the following process:

Polarisation of the membrane of a nerve fibre

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Explain the following process:

Depolarisation of the membrane of a nerve fibre.

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Explain the following processes:

Conduction of a nerve impulse along a nerve fibre

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined

Write short note on the following: 

Neural coordination

[18] Neural Control and Coordination
Chapter: [18] Neural Control and Coordination
Concept: undefined >> undefined
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