What is the full form of CAD?

Which of the following organisms do not show double circulation?

Which of these ions play an important role in blood clotting?

Eosinophils are a type of agranulocyte. True or false?

What is the colour of leucocytes?

How many chambers are present in the heart of crocodiles?

How many times does the heart beat in one minute?

Which of these is known as the pacemaker of the heart?