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Important Questions for HSC Science (General) 12th Board Exam - Maharashtra State Board - Biology

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Answer the following questions related to sex determination in human beings:
i. What is sex chromosome?
ii. How many pairs of chromosomes are present in human beings?
iii. How is the sex of the human offspring determined?
iv. Draw a diagram depicting sex determination in man.

Appears in 2 question papers
Chapter: [7.02] Chromosomal Basis of Inheritance
Concept: Sex Determination in Humans

Explain mechanism of sex-determination in birds.

Appears in 2 question papers
Chapter: [7.02] Chromosomal Basis of Inheritance
Concept: Sex Determination in Birds

Illustrate any ‘three’ genes which can be used in gene therapy.

Appears in 2 question papers
Chapter: [8.01] Genetic Engineering and Genomics
Concept: Biotechnological Applications in Medicine

Describe the steps of PCR technique.

Appears in 2 question papers
Chapter: [8.01] Genetic Engineering and Genomics
Concept: Biotechnological Applications in Medicine

What is vaccine?

Appears in 2 question papers
Chapter: [8.01] Genetic Engineering and Genomics
Concept: Biotechnological Applications in Medicine

Give economic importance of apiculture

Appears in 2 question papers
Chapter: [9.02] Animal Husbandry
Concept: Animal Husbandry

With the help of a labelled diagram describe the internal structure of human heart.

Appears in 2 question papers
Chapter: [10.01] Circulation
Concept: Circulatory Pathways > Human Circulatory System

Sketch and label ‘L.S. of human kidney’

Appears in 2 question papers
Chapter: [10.02] Excretion and Osmoregulation
Concept: Human Excretory System

Draw labelled diagrams of the following: Eye

Appears in 2 question papers
Chapter: [10.03] Control and Co-ordination
Concept: Sensory Reception and Processing > Eye - Parts of an Eye

With the help of a neat and labelled diagram, describe reflex arc.

Appears in 2 question papers
Chapter: [10.03] Control and Co-ordination
Concept: Reflex Action and Reflex Arc

Describe the T. S. of thyroid gland

Appears in 2 question papers
Chapter: [10.03] Control and Co-ordination
Concept: Endocrine Glands and Hormones

With the help of a neat, labelled diagram describe the human male reproductive system.

Appears in 2 question papers
Chapter: [11.01] Human Reproduction
Concept: The Male Reproductive System

What is spermatogenesis? Briefly describe the process of spermatogenesis.

Appears in 2 question papers
Chapter: [11.01] Human Reproduction
Concept: Gametogenesis

Describe the T.S. of human testis

Appears in 2 question papers
Chapter: [11.01] Human Reproduction
Concept: Microscopic Anatomy of Testis

What is Red Data Book?

Appears in 2 question papers
Chapter: [12.01] Organisms and Environment 2
Concept: Red Data Book

Lever mechanism of pollination is observed in

  1. Salvia
  2. Jasmine
  3. Bougainvillea
  4. Butea
Appears in 1 question paper
Chapter: [0.01] Reproduction in Lower and Higher Plants
Concept: Pre-fertilisation - Structures and Events > Pollination

Define vegetative propagation. 

Appears in 1 question paper
Chapter: [0.01] Reproduction in Lower and Higher Plants
Concept: Asexual Reproduction

Differentiate between 'stem tuber' and 'tuberous root'.

Appears in 1 question paper
Chapter: [0.01] Reproduction in Lower and Higher Plants
Concept: Asexual Reproduction

Vegetative propagation takes place with the help of leaves in _______ plant.

(A) Kalanchoe

(B) Oxalis

(C) Cynodon

(D) Dahlia

Appears in 1 question paper
Chapter: [0.01] Reproduction in Lower and Higher Plants
Concept: Asexual Reproduction

Label the parts (1) and (2) in budding of yeast cell.

Appears in 1 question paper
Chapter: [0.01] Reproduction in Lower and Higher Plants
Concept: Asexual Reproduction
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