Question 10
Migratory birds fly to far away areas during a particular time of the year. Which of the following conditions present in their habitat during that time are responsible for this behaviour?

(i) Unavailability of food
(ii) Extreme weather conditions
(iii) Over crowding
(iv) Lack of nesting areas

(a) ii & iii
(b) i & ii
(c) i & iv
(d) ii & iv

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Solution

(b) i & ii

Non-availability of food and extreme weather conditions present in the habitat of the migratory birds are responsible for them to fly to far off areas where the conditions are more conducive and cogenial for their survial.

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Q. Question 10
Migratory birds fly to far away areas during a particular time of the year. Which of the following conditions present in their habitat during that time are responsible for this behaviour?

(i) Unavailability of food
(ii) Extreme weather conditions
(iii) Over crowding
(iv) Lack of nesting areas

(a) ii & iii
(b) i & ii
(c) i & iv
(d) ii & iv

Which of the following species can act both as Bronsted acid and base?
(I) $N H_{2}^{-}$ (II) $H C O_{3}^{-}$ (III) $A l C l_{3}$ (IV)All of these

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Which of the following are Indian cattle?

(i) Bos indicus
(ii) Bos domestica
(iii) Bos bubalis
(iv) Bos vulgaris

(a) (i) and (iii)
(b) (i) and (ii)
(c) (ii) and (iii)
(d) (iii) and (iv)

Q. Consider the following anions:

When attached to

s_{p^{3}}

-hybridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order:

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Migration

Standard IX Biology

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(b) i & ii Non-availability of food and extreme weather conditions present in the habitat of the migratory birds are responsible for them to fly to far off areas where the conditions are more conducive and cogenial for their survial.

(b) i & ii

Non-availability of food and extreme weather conditions present in the habitat of the migratory birds are responsible for them to fly to far off areas where the conditions are more conducive and cogenial for their survial.