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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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Match the pairs:

  Column A   Column B
(i) Compost making
biofertilizer
(a) Azotobacter
(ii) N2 fixing biofertilizer (b) Mycorrhiza
(iii) Fungal biofertilizer (c) Agrobacterium
(iv) Phosphate solubilizing
biofertilizer
(d) Actinobocteria
[11] Enhancement of Food Production
Chapter: [11] Enhancement of Food Production
Concept: undefined >> undefined

Complete the chart:

S. No. Gland Hormone produced Effect
(i) Hypothalamus ______ Acts on kidneys, stimulates reabsorption of water.
(ii) ______ Somatotropin Stimulates growth and development of all tissues
(iii) Thyroid gland ______ Regulates basal metabolic rate.
(iv) ______ Thymosin Maturation of T-lymphocytes.
[9] Control and Co-ordination
Chapter: [9] Control and Co-ordination
Concept: undefined >> undefined

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What is Cardiac output?

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

Complete the following box with reference to symptoms of mineral deficiency:

Abscission Pre-mature fall of flowers,
fruits and leaves
______ Appearance of green and
non-green patches on leaves
[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Differentiate between X-chromosome and Y-chromosome with reference to –

  1. length of non-homologous regions
  2. type as per the position of the centromere
[3] Inheritance and Variation
Chapter: [3] Inheritance and Variation
Concept: undefined >> undefined

Enlist role and deficiency symptoms of Zinc.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Enlist role and deficiency symptoms of Calcium.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Aspergillus niger is used to manufacture

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

Give the name of the deficiency caused due to sulphur in stem and root.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Give reason: Some deficiency symptoms of mineral are visible in young leaves while some appear in older leaves.

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Give reason:

The wall of left ventricle is thicker than right ventricle

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

Give observed symptom when the following mineral are deficient.

Deficiency of Cu

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Give observed symptom when the following mineral are deficient.

Deficiency of Bo

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Give observed symptom when the following mineral are deficient.

Deficiency of Zn

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

Give observed symptom when the following mineral are deficient.

Deficiency of K

[7] Plant Growth and Mineral Nutrition
Chapter: [7] Plant Growth and Mineral Nutrition
Concept: undefined >> undefined

A root hair is derived from ______ cell.

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

What are the time durations for each of the following events in cardiac cycle?

  1. Atrial systole
  2. Atrial diastole
  3. Ventricular systole
  4. Ventricular diastole
[8] Respiration and Circulation
Chapter: [8] Respiration and Circulation
Concept: undefined >> undefined

Small swellings on the surface of the chromosome are called______.

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

Name the enzyme that catalyses the synthesis of the primary transcript.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
Concept: undefined >> undefined

List the changes that the primary transcript undergoes to become functional mRNA.

[4] Molecular Basis of Inheritance
Chapter: [4] Molecular Basis of Inheritance
Concept: undefined >> undefined
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