For effective functioning of a bird's quill feather, ...
For effective functioning of a bird's quill feather, hooks fit on the ridge of the
Vane
rachis
barbules
barbs
Correct answer is C
No explanation has been provided for this answer.
Which of the following organs in humans is responsible for the removal of excess water? ...
Which of these is not a hereditary variation? ...
The pituitary gland is called the Master gland because ...
The kidneys of all vertebrates act as osmoregulators. This means that they ...
The cell is a functional unit of living organisms because ...
What type of relation exists between a tapeworm and an infected mammal? ...