Biology 2nd Paper MCQ-Mymensingh Board-2021

1. If mother is colour blind and father is notmal, what percentage of sons will be colour blind?

2. Why is $1: 2: 1$ instead of $3: 1$ ?

3. Which is the part of head capsule of above mentioned animal?

4. Ammocete larval stage seen in which animal?

5. Which valve is present between right atrium and right ventricle?