Biology II - For Class X (Science) - Guess Papers 2026 - By Sir Sajjad Akber Chandio

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Class X (Science)
Biology II

Sir Sajjad Akber Chandio

Guess paper 2026

Note: Cover MCQs (MULTIPLE CHOICE QUESTION - 12Marks) by reading chapters from text book; model papers and past year papers.

SECTION “B”
(SHORT ANSWER QUESTIONS) (Marks 24)

Time Duration 2½ hours
NOTE: Answer any 10 questions from this section. Each question carries 03 marks. Answer should be clear and according to need. No extra detail is required.
1- What is biodiversity? Describe its importance.
2- Explain the differences between transport systems in plants and animals.
3- What is a microorganism? Describe its benefits and harms.
4- Describe the causes and effects of environmental pollution.
5- What is the importance of enzymes in digestion?
6- Explain different methods of asexual reproduction in animals.
7- What is evolution?
8- Describe the structure of the human heart.
9- What are hormones? What are their functions?
10- Describe internal and external fertilization with examples.
11- Define inheritance and explain Mendel’s law.
12- Write short notes on:

• Symbiosis
• Respiration

SECTION “C”
(LONG SECTION) (Marks 24)

1- Describe the structure and functions of the human brain.
2- Explain the structure and functions of plant tissues.
3- Describe Darwin’s theory of evolution.
4- Explain the importance of enzymes.
5- Describe the structure and function of the kidney.
6- Explain the process of photosynthesis in detail.
7- Write detailed notes on microorganisms and their importance.
8- Describe the human reproductive system.
9- Describe abiotic and biotic factors of an ecosystem.
10- Describe osmotic adjustment in plants.
11- How does skin work as a thermoregulatory organ?
12- Describe pancreas and its relation with diabetes. How is diabetes controlled?
13- Define biotechnology and explain its scope and importance.
14- Describe disorders of bones (rickets, osteoporosis, arthritis).
15- What is germination? Describe its conditions and types (epigeal & hypogeal).
16- Describe nitrogen cycle as a biogeochemical cycle.
17- Define endocrine system. Name three glands with one secretion each.

✅ DIFFERENCES

• Inspiration vs Expiration
• Photosynthesis vs Respiration
• Asexual vs Sexual reproduction
• DNA vs RNA
• Epigeal vs Hypogeal germination
• Chemical vs Nervous coordination

✅ DEFINITIONS

• Homeostasis
• Myopia
• Hyperopia
• Color blindness
• Transpiration
• Guttation
• Double fertilization
• Spermatogenesis
• Oogenesis
• Stimulus and Response
• Budding
• Vegetative propagation
• Filtration
• Binary fission
• Evolution

✅ DIAGRAMS

• Male & female reproductive system (rabbit)
• Fruit formation
• Nephron
• Nitrogen cycle
• Male gametophyte
• Structure of pollen grain
• T.S. of angiospermic flower
• Hinge & ball-and-socket joint
• Human ear and eye
• Human respiratory system
• Stages of fruit formation (labelled)

✅ CONCEPTUAL QUESTIONS

1- Define feedback control mechanism of hormonal secretion.
2- Describe disorders of the nervous system.
3- Describe the structure of a neuron (with diagram).
4- What is an artificial ventilator?
5- Explain osmoregulation in terrestrial organisms.
6- What are the main aspects of homeostasis?
7- What are the excretory organs in humans?
8- Explain reflex action with reflex arc.
9- What are the main functions of the skeleton?
10- Define pollination, its types, and importance.

✅ REASONS

1- Why is a driving license not issued to a color-blind person?
2- Why is nervous control faster than chemical control?
3- Why does the thyroid gland swell (goiter)?
4- Why is homeostasis required?
5- Why do stomata open during daytime?
6- Why does a sunflower move with the sun?

✅ SHORT NOTES

• Deforestation
• Greenhouse effect
• Stomata

✅ DISEASES

• Types of arthritis

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Guess paper 2025

Note: Cover MCQs (MULTIPLE CHOICE QUESTION - 12Marks) by reading chapters from text book; model papers and past year papers.

SECTION “B”
(SHORT ANSWER QUESTIONS) (Marks 24)

Time Duration 2½ hours
NOTE: Answer any 10 questions from this section. Each question carries 03 marks. Answer should be clear and according to need. No extra detail is required.
Q.1: Difference between:

• Inspiration and expiration
• Photosynthesis and respiration
• Asexual and sexual reproduction
• DNA and RNA
• Epigeal and Hypogeal germination plants
• Chemical and nervous co-ordination

Q.2: Define the following:
Homeostasis , myopia , color-blindness , hyper myopia, transpiration guttation, double fertilization, spermatogenesis, oogenesis, stimuli response, budding & vegetative propagation, Hyperopia, filtration, binary fission, Evolution.

Q.3: Diagrams:

• Reproductive organ of male & female rabbit
• A fruit formation
• Nephron
• Nitrogen Cycle
• Male gametophyte
• Structure of pollen grain
• TS of angiospermic flower
• Hinge & ball and socket joint
• Human ear and Eye
• Human respiratory system

Q.4: Define feedback control mechanism of hormonal secretion.
Q.5: Disorder of nervous system
Q.6: Describe the structure of neuron along with diagram.
Q.7: What is artificial ventilator?
Q.8: Explain Osmoregulation in terrestrial organism?
Q.9: What are the main aspects of homeostasis?
Q.10: What are the excretory organs in man?
Q.11: How reflex action work by reflex arc? 
Q.12: What are the main functions of skeleton.
Q.13:  Write about artificial ventilator?
Q.14: Define Pollination and its types. Write down importance of pollination?

Q.15 Reasons:

• Why driving licensee is not issued to color blind person?
• Why the nervous control is faster than chemical control?
• Why thyroid gland swells up give name of disease?
• Why homeostasis is required?
• Why stomata generally open during day time?
• Why does sunflower move with the sun?

Q.16: Short notes:

• Deforestation
• Greenhouse effect
• Stomata

Q.17: Name and define common types of Arthritis.

SECTION “C”
(LONG SECTION) (Marks 24)

NOTE: Attempt any Four questions from this section. Each question carries 06 marks.
Q.1: Describe abiotic factor and biotic factor of ecosystem.
Q.2: Describe the structure of human brain.
Q.3: Describe the osmotic adjustment in plant. 
Q.4: How skin work as thermoregulatory organ?
Q.5: Explain the types of muscles along with diagram.
Q.6: Describe Pancreas how is it related with diabetes? How is diabetes controlled?
Q.7: Define biotechnology & describe the scope and importance of biotechnology. 
Q.8: Describe the disorder of bones and their cause (rickets osteoporosis, arthritis its types and causes of arthritis).
Q.9: What is germination? Give the condition of germination also describe methods of different germination (Epigeal and hypogeal).
Q.10: Describe nitrogen cycle as biogeochemical.
Q.11: Define endocrine system write down names of any three endocrine glands with one secretion of each?
Q.12: Draw a neat and Labelled diagram of Stages of fruit formation.

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