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HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions for Biology

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Biology
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What is translocation of food?

[6] Plant Water Relation
Chapter: [6] Plant Water Relation
Concept: undefined >> undefined

Classify the following to form Column B as per the category given m Column A:

Hormones: Estrogen, Glucagon, Epinephrine, Relaxin, Somatostatin, NorAdrenalin

  Column A Column B
(1) Ovary ______
(2) Pancreas ______
(3) Adrenal medulla ______
[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
Concept: undefined >> undefined

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Cushing's syndrome is developed due to ______.

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
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Write Hardy Weinberg's equation.

[5] Origin and Evolution of Life
Chapter: [5] Origin and Evolution of Life
Concept: undefined >> undefined

Complete the given table:

Name of polluting gas Source Effect
____________ ____________ Combining with haemoglobin and
causing respiratory problems
NO2 Chemical industries ____________
CO2 ____________ ____________
____________ Biogas plants Greenhouse effect
[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
Concept: undefined >> undefined

Give the floral adaptations for chiropterophily.

[5] Origin and Evolution of Life
Chapter: [5] Origin and Evolution of Life
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If centromere is situated in the middle of the chromosome, it is called ________.

(a) Metacentric

(b) Acrocentric

(c) Submetacentric

(d) Telocentric

[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
Concept: undefined >> undefined

In which type of adaptation, forelimbs are modified into wings?

(a) Aquatic adaptations

(b) Volant adaptations

(c) Arboreal adaptations

(d) Cursorial adaptations

[5] Origin and Evolution of Life
Chapter: [5] Origin and Evolution of Life
Concept: undefined >> undefined

If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus?

  1. 9
  2. 18
  3. 27
  4. 36
[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
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With the help of a neat and labelled diagram explain VAM (vesicular arbuscular mycorrhizae).

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
Concept: undefined >> undefined

Normal activities of the heart are regulated by ______________.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
Concept: undefined >> undefined

What is gene pool?

[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
Concept: undefined >> undefined

Sketch and label the ventral view of the human heart.

[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
Concept: undefined >> undefined

Trichoderma konigi is a source of _______ enzyme.

(A) invertase

(B) lipase

(C) pectinase

(D) cellulase

[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
Concept: undefined >> undefined

Define the term ‘genome’.

[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
Concept: undefined >> undefined

Sketch and label the structure of chromosome.

[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
Concept: undefined >> undefined

Define Endocrine gland

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
Concept: undefined >> undefined

Enlist any 'two' floral adaptations in salvia.

[5] Origin and Evolution of Life
Chapter: [5] Origin and Evolution of Life
Concept: undefined >> undefined

Distinguish between X andY chromosomes. (Mention any 'two' points.) 

[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
Concept: undefined >> undefined

Describe the T. S. of thyroid gland

[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
Concept: undefined >> undefined
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