Biology 2nd Paper CQ-Barishal Board-2023

What is antigonistic muscle?

Why cardiac muscle is not tired?

Describe the structural unit of 'P'.

To move 'P' and 'R', 'Q' pulls them but do not push them-Explain it.

What is phenotype?

Why all test cross are back cross but all back cross are not test cross?

Explain genetically the blood group of Mr. Rahim.

Analyze the causes of different colour vision of Mr. Rahim and his brother.

What is stroke?

What do you mean by second pacemaker?

Describe the starting matter mentioned in the stem.

Second part of the stem is very significant-Analyze.

What is peristalsis?

Write down the names and functions of two sphincters of stomach.

Write down the metabolic function of 'P' mentioned in the stem.

How does secreted hormone from organ 'Q' controls glucose level in blood-Analyze according to the stem.

What is portal venus system?

Why does the coelenteron of Hydra called gastro-vascular cavity?

Explain how the mentioned chemical substance complete the physiological functions.

How is vision affeected by light in the case of the mentioned animal. Analyze it.