Online Practice Q_ANS on CHAPTER => 9 (Heredity and Evolution )

This is Online Practice Q_ANS on CHAPTER => 9 (Heredity and Evolution )for preparation of CBSE BOARD Examination, NTSE etc.


VERY SHORT ANSWER TYPE QUESTIONS (1 Mark):

1. Write the scientific name of men and garden pea.
2. Where are genes located ?
3. No two individuals are absolutely alike in a population. Why ?
4. What are the chromosomes XY and XX known as ?
5. Name five varieties of vegetables which have been produced from ‘wild
cabbage’ by the process of artificial selection.

SHORT ANSWER TYPE QUESTIONS (2 Marks):

1. Differentiate between homologous and analogous organs, with examples.

2. What are fossils ? How can the age of fossils be determined ?

SHORT ANSWER TYPE QUESTIONS (3 Marks):

1. Variation is beneficial to the species but not necessarily for the individual.
Give three reasons to justify it.

2. The human hand, cat paw and horse foot, when studied in detail show the
same structure of bones and point towards a common origin.
(a) What do you conclude from this ?
(b) What is the term given to such structures ?

LONG ANSWER TYPE QUESTIONS (5 Marks):

1. Which one is the edible part in kale, kohlrabi, broccoli, cabbage and
cauliflower ?
2. Name a recessive trait which is quiet common in human beings.

VALUE BASED QUESTION:

Raghu often taunts his wife for having only daughters and no son. As a
student of biology, how will you convince Raghu that his wife has no role in
giving birth to girls only ?

Hints to Long Answer Type Questions:

1. Kale - Large leaves
Kohl rabi - Swollen part
Broccoli - Arrested flower
Cauliflower - Sterile flower
Cabbage - Leaves with short distance between them

2. (a) Human height
(b) Skin colour
(c) Attachment of ear lobes
(d) Eye colour

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