Question

Bones of the birds____________________ to help them fly easily.

A Are very thin

B Are hollow and light

C Are very soft and flexible

D Are freely movable

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Answer 1

Answer:

here it is

Explanation:

answer is b (bones of birds are hollow to reduce weight which helps them to fly)

Answer 2

✝️ Correct Answer:

$\large{ \underline{ \boxed{ \bf{ \red{Are \: hollow \: and \: light}}}}}$

✏ Option B

✝️ Explanation:

Bones of birds are not actually hollow completely but they have more air spaces as compared to mammal's bones. This makes their bones light and hollow. The purpose is to reduce their body weight and balance during flight. They provides support to their body without much reduced weight.

✝️ Explore more:

✏ Other characteristics of Birds(Aves):

• Their body is streamlined with head, neck, a trunk and a tail. This helps in balance in flight.
• They have feathers which is feathers that serve as an insulating coat to their body.
• Their Forelimbs ar modified as wings and hindlimbs helps in walking, capturing prey etc.
• They excrete uric acid.
• They are warm blooded animals.
• They are oviparous(egg laying animals).

☄ They don't have Urinary bladder and the uric acid is not stored inside instead it is sent out immediately to reduce weight. Hence, Don't feel nasty when they excrete on you, because they are compelled to do so. ☄

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