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questions
List of practice Questions
Seminiferous tubules
ICSE Class X board - 2026
ICSE Class X board
Biology
Biology and Human Welfare
(a) Name the fluid present between the meninges in spinal cord.
ICSE Class X board - 2026
ICSE Class X board
Biology
sense organs
Expand the abbreviations:
(a) NADP
(b) ADP
(a) NADP
ICSE Class X board - 2026
ICSE Class X board
Biology
Ecology & Environment
(a) Explain the term Synapse.
ICSE Class X board - 2026
ICSE Class X board
Biology
sense organs
Name the neurotransmitter that allows the transmission of impulses across the synapse.
ICSE Class X board - 2026
ICSE Class X board
Biology
sense organs
What is the role of the following?
(a) Leydig cells
ICSE Class X board - 2026
ICSE Class X board
Biology
Biology and Human Welfare
Differentiate between Mitosis in plant cell and animal cell based on Cytokinesis.
ICSE Class X board - 2026
ICSE Class X board
Biology
Cell Biology
Sara placed a healthy potted plant in a dark room for 48 hours to perform an experiment on photosynthesis. She plucked one of the leaves and tested it for starch. The leaf did not turn blue-black on adding Iodine solution.
(a) Name the structure.
(b) Label Gray matter and White matter.
ICSE Class X board - 2026
ICSE Class X board
Biology
Plant Physiology & Biochemistry
Write the overall chemical equation for photosynthesis.
ICSE Class X board - 2026
ICSE Class X board
Biology
Plant Physiology & Biochemistry
Mention any two secondary sexual characteristics in a 15-year-old boy.
ICSE Class X board - 2026
ICSE Class X board
Biology
Biology and Human Welfare
Explain the term 'Population Density' with reference to human beings.
ICSE Class X board - 2026
ICSE Class X board
Biology
Ecology & Environment
A 17-year-old girl was having irregular menstrual cycle. Her mother took her to their family physician. She was diagnosed with Adrenal Virilism. Study the picture given below and answer the following questions.
(a) Hypersecretion of which hormone results in Adrenal Virilism in human females?
(b) Mention one symptom of this disorder.
ICSE Class X board - 2026
ICSE Class X board
Biology
The endocrine system
RBCs do not have nuclei. Discuss its advantage.
ICSE Class X board - 2026
ICSE Class X board
Biology
Biology and Human Welfare
Arrange the following food chains in a proper sequence.
(a) Small fish, Algae, Mosquito larvae, Kingfisher
ICSE Class X board - 2026
ICSE Class X board
Biology
Ecology & Environment
A 28-year-old pregnant lady goes to a gynecologist for a check-up. Her doctor explains that there is normal growth of the foetus and the placenta is functioning well.
ICSE Class X board - 2026
ICSE Class X board
Biology
Biology and Human Welfare
How are the Cytons and Axons of neurons arranged in the following?
(a) Cerebrum
(b) Spinal Cord
ICSE Class X board - 2026
ICSE Class X board
Biology
sense organs
(a) Who proposed the theory of Natural Selection?
ICSE Class X board - 2026
ICSE Class X board
Biology
Genetics and Evolution
Name the organism which was used as an example to explain Industrial Melanism.
ICSE Class X board - 2026
ICSE Class X board
Biology
Genetics and Evolution
Differentiate between Plasmolysis and Deplasmolysis.
ICSE Class X board - 2026
ICSE Class X board
Biology
Plant Physiology & Biochemistry
What is the scientific name of modern man?
ICSE Class X board - 2026
ICSE Class X board
Biology
Genetics and Evolution
The organ that secretes this hormone.
ICSE Class X board - 2026
ICSE Class X board
Biology
The endocrine system
Which is the resting but metabolically active stage of the cell cycle?
ICSE Class X board - 2026
ICSE Class X board
Biology
Cell Biology
Choose the odd one out from the following terms and name the category to which the others belong:
ICSE Class X board - 2026
ICSE Class X board
Biology
Cell Biology
The hormone responsible for this disorder.
ICSE Class X board - 2026
ICSE Class X board
Biology
The endocrine system
A defect in our eye in which some parts of the object are in focus while the other parts are blurred.
ICSE Class X board - 2026
ICSE Class X board
Biology
sense organs
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