Question

(vi) Which one of the following is the characteristics of birds?
(a) Strong muscles
(b) Light bones
(c) Hollow bones
(d) All of these

Answer 1

Answer:

Its option d

All these characters help them to fly to long distances without any inconvenience plus they dont have the bone marrow porous bones which make them lightweight. Which is the advantage. And 9air sacs as lungs for continous oxygenation..

Hope it helps:-)

Answer 2

The following is the characteristics of birds - (d) All of these

• Strong muscles
• Light bones
• Hollow bones

What are the characteristics of the bones of birds?

• Fully ossified: The endoskeleton of the birds is composed of fully ossified bones.
• Long: The bones of the birds are quite long.
• Hollow: The bones are hollow and air cavities are present in the hollow bones. This helps in reducing the weight.
• Light: The bones of birds are light, so as to reduce the weight of the bird.

Besides these, birds have strong muscles.

All the characteristics mentioned here aid the bird in flying.