12th Biology

Past Papers Biology 2nd Year Federal Board 2021

past papers biology

Past papers Biology 2nd Year 2021 federal board download in pdf. FBISE solved old papers HSSC 2. FBISE solved past paper of Biology 2nd year.

Past Papers Biology 2nd Year:

Read some sample Multiple choice questions from the old paper of Biology 2021.

Which of the following factors does NOT affect the rate of alveolar diffusion?
Solubility of gases
Thickness of membrane
Reactivity of the gases
Pressure gradient

Glomerular filtration occurs due to higher.
Osmotic Pressure
Colloidal Pressure
Hydrostatic Pressure
Solute Pressure

Which of the following does NOT represent a fibrous joint?
Socket in Mandible
Pubic Symphysis
Shaft of femur
The root of a Tooth

Short Questions Paper 2021:

(i)State how ammonia la excreted in living organisms Briefly discuss with examples
(ii)Bnafly discuss how cross-bridges are controlled during muscle contraction
(1) How lasts acts as endocrine glands?
(2) Discuss blood circulation to nephron
(3) What is meant by positive feedback? How does it occur?

How is a blastula formed?
What are polygenic traits? How do they express themselves?
Discuss Holoblastic cleavage?
What is meant by a null gamete? How does It determine the sex of an offspring?

Long Questions Part:

What is resting membrane potential? Describe factors responsible for establishing RMP Also draw the diagram.
Explain the development of humans in the first trimester.

Download complete paper objective and subjective parts in pdf given below.

For more study material and past papers of fsc visit the Home page.

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