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ICSE Class X Sample / Model Paper 2024 : Biology

5 pages, 50 questions, 0 questions with responses, 0 total responses,

Anshul Jain
Pawar Public School (PPS), Hadapsar, Pune

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Questions Try karke dekto Section-A (Attempt all questions from this Section) Question 1. Choose the correct answers to the questions from the given options. (Do not copy the question, write the correct answer only.): (i) The pigment that gives colour to urine: (a) Haemoglobin (b) Chlorophyll (c) Urochrome (d) Melanin (c) Iris (d) Ciliary muscles ( ) The pigmented circular area seen in front of the eye: (a) Cornea (b) Lens (ii) Select the correct statement: (a) Heterotrophs do not synthesize their own food. (b) Heterotrophs utilise solar energy for photosynthesis. (c) Heterotrophs synthesise their own food. (d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates. (iv) In a synapse, a chemical signal is transmitted from: (a) Dendriticend of one neuron to the axonal end of another neuron. (b) Axon to the cell body of the same neuron. (c) Cell body to the axonal end of the same neuron. (d) Axonalend of one neuron to the dendriticend of another neuron. (v) A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic makeup of tall parent can be depicted as: (a) TTWW (b) TTww (c) TtWW (d) TtWw (vi) The correct sequence of reproductive stages seen in flowering plants is: (c) Seedling, embryo, zygote, gametes (a) Gametes, zygote, embryo, seedling (b) Zygote, gametes, embryo, seedling (d) Gametes, embryo, zygote, seedling (vii) Assertion (A): Meiosis is necessary for sexual reproduction in organisms. Reason (R):It ensures the halving of the chromosome number in gametes. (a) (b) (c) (d) Both A and R are True. Both A and R are False. A is True and R is False. A is False andR is True. (vii) New species may be formed if: (a) DNA undergoes significant changes in germ cells. (b) Chromosome number dhanges in the gamete. (c) There is no change in the genetic material. (d) Mating does not take place.

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