Biology 2nd Paper MCQ-Chittagong Board-2023

1. The human heart beats automatically. It transports Oxygenated blood throughout the body through specialized blood vessels.

The characteristics of the blood vessels mentioned in the stem are-

2. The scale of Rui fish is-

i. composed of lime and collagen fiber

ii. derived from epidermal layer

iii. main defence organ

Which one is correct?

3. The animal mentioned in the stem is -

i. Pontaradial symmetry

ii. With tube feet

iii. Marine

Which one is correct?

4. As mentioned in the stem, 'B' marked organ have

i. Protein

ii. Carbohydrate

iii. Hat type of digestive enzyme

Which one is correct?

5. From which bile juice secreted?