HSC Science (General)
Academic Year: 2024-2025
Date & Time: 27th February 2025, 11:00 am
Duration: 3h
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General Instructions :
The question paper is divided into four sections.
- Section A: Q. No. 1 contains Ten multiple choice type of questions carrying one mark each. Evaluation will be done for the first attempt only.
Q. No. 2 Contains Eight very short answer type of questions carrying one mark each. - Section B: Q. No. 3 to 14 are short answer type of questions carrying two marks each. (Attempt any Eight)
- Section C: Q. No. 15 to 26 are short answer type of questions carrying three marks each. (Attempt any Eight)
- Section D: Q No 27 to 31 are long answer type of questions carrying four marks each. (Attempt any Three)
- Begin the answer to each section on a new page.
The aquatic plant ______ is known as “Terror of Bengal”.
Lotus
Pistia
Eichhornia
Vallisneria
Chapter:
A flower shows dull colour, strong fragrance and edible pollen grains. The type of pollination in such flowers is ______.
Anemophily
Chiropterophily
Ornithophily
Entomophily
Chapter:
Part of the sperm containing enzymes for penetration of corona radiata is ______.
tail
middle part
neck
head
Chapter:
In bird population of newly formed volcanic island, a rare allele of a gene was noted to be much more prevalent than the populations of same species on the mainland. This is known as ______ effect.
Founder
Bohr
Bottle neck
Haldane
Chapter:
In a plant, deficiency symptom called ‘Die-back of shoots’ was observed. This can be rectified by this element:
Zinc
Sulphur
Iron
Copper
Chapter:
Insect resistant property in cotton crop is developed by introducing a gene from ______.
Bacillus thuringiensis
Bacillus subtilis
Bacillus polymyxa
Escherichia coli
Chapter:
The type of interspecific interaction in which one species is harmed and other is not affected is termed as ______.
commensalism
parasitism
amensalism
mutualism
Chapter:
The small pores present on woody stem surface with bark and which carry out gaseous exchange are ______.
stomata
hydathode
ventricles
lenticels
Chapter:
In the given food chain, if plants absorb 1000 Joules of light energy, then how much energy is available for Lion?
Plants → Deer → Lion
(Producer) (Herbivore) (Carnivore)
10 Joules
100 Joules
1000 Joules
0.1 Joule
Chapter:
Glucagon is secreted by ______ cells of pancreas.
PP
alpha
delta
beta
Chapter:
What is the effect of excessive transpiration in leaves?
Chapter:
Which method of plant breeding can be used to obtain many genetically identical saplings of endangered species?
Chapter:
Define Spermatogenesis.
Chapter: [0.02] Reproduction in Lower and Higher Animals
What is a grand period of growth?
Chapter: [0.07] Plant Growth and Mineral Nutrition
Which is the first step in the process of absorption of water by roots from soil?
Chapter:
Name the hormonal disorder caused due to hyperthyroidism in adults.
Chapter:
Enlist any two domesticated species of honeybee.
Chapter:
Give Technical Term for the following:
Name the vein in the human body which carries oxygenated blood.
Chapter: [0.08] Respiration and Circulation
The health worker in hilly area will advise people to prevent which deficiency disease?
Which micronutrient is deficient in the above area?
Chapter:
Name the vector responsible for causing malaria.
Chapter:
Name the vector responsible for causing filariasis.
Chapter:
Name two chromosomal disorders which show presence of 47 chromosomes. Give their genotypes.
Chapter:
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Which germinal layer produces the following structure?
Eustachian tube
Chapter:
Which germinal layer produces the following structure?
Pineal gland
Chapter:
Which germinal layer produces the following structure?
Middle ear
Chapter:
Which germinal layer produces the following structure?
Lining of middle ear
Chapter:
Due to environmental change in area, the fruits were taking more time for ripening. Which gaseous growth regulator can be suggested to fruit merchant? Give the source of the same in plants.
Chapter:
Explain two-celled stage of pollen grain in angiosperms.
Chapter:
What is the difference between Heterocatalytic and Autocatalytic function of DNA?
Chapter:
What is transpiration?
Chapter: [0.06] Plant Water Relation
Give reason:
When Rh −ve mother conceives Rh +ve foetus, then she is given injection of anti Rh antibodies.
Chapter:
Complete the following table −
| Organ Region | Sympathetic Effect | Parasympathetic Effect | |
| (i) | Heart beat | Increases | |
| (ii) | Blood vessels | Dilates | |
| (iii) | Arterial B.P. | Decreases | |
| (iv) | Pupil of eye | Constricts | |
| (v) | Gastrointestinal movements | Retards peristalsis | |
| (vi) | Urinary bladder | Relaxes |
Chapter:
Sketch and label T.S. of human artery.
Chapter: [0.08] Respiration and Circulation
Enlist the characteristics of genetic code.
Chapter: [0.04] Molecular Basis of Inheritance
In the process of rDNA technology, if two separate restriction enzymes are used to cut vector and donor DNA then which problem will arise in the formation of rDNA or chimeric DNA? Explain.
Chapter: [0.12] Biotechnology
Name any two restriction enzymes and their source organisms.
Chapter:
Explain vestigeal organs as evidence of evolution.
Chapter:
Give any two examples of vestigeal organs in human beings.
Chapter:
What is the water potential?
Chapter: [0.06] Plant Water Relation
Explain factors affecting water absorption.
Chapter: [0.06] Plant Water Relation
Draw the developmental flow chart in plant from seed germination to death of plant.
Chapter:
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Which element is mostly fixed by biofertilizer?
Chapter:
State any three benefits of Biofertilizers.
Chapter: [0.11] Enhancement of Food Production
What is ‘biofortification’?
Chapter: [0.11] Enhancement of Food Production
Explain biofortification with respect to GM food plants.
Chapter:
Give diagrammatic representation of ‘decomposition cycle’.
Chapter:
What is biomagnification?
Chapter: [0.14] Ecosystems and Energy Flow
Draw the flow chart and explain it with respect to DDТ.
Chapter:
What is the location of blind spot in human eye?
Chapter:
Name the cells which function in dim light and day light.
Chapter:
Explain with the help of a suitable diagram conducting system of human heart.
Chapter: [0.08] Respiration and Circulation
Explain incomplete dominance with suitable example.
Chapter:
Show the genotype in incomplete dominance with the help of a chart.
Chapter:
Show the genotype in codominance with the help of a chart.
Chapter:
What is Siphonogamy?
Chapter: [0.01] Reproduction in Lower and Higher Plants
Differentiate between chalazogamy and porogamy with respect to the entry of the pollen tube.
Chapter:
Draw a neat and labelled diagram to show mesogamy.
Chapter:
If woman's fallopian tube is blocked, which treatment can be given to overcome infertility? Explain in brief.
Chapter:
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