Sakil Ahmed Classes

    Chapter: Sources of Energy . A. MCQ & Very Short Questions (Mark : 1) Q1. Which of the following is not a conventional source of energy? [HSLC’16] (a) Fossil fuels (b) Bio-Mass (c) Nuclear energy (d) Wind energy Answer: (d) Wind energy ✅ Wind energy is a non-conventional source, whereas fossil fuels, biomass, and nuclear energy are conventional. Q2. Which of the following is not derived from energy of the sun? [HSLC’18, ’24, ’25] (a) Biomass (b) Nuclear energy (c) Geothermal energy (d) Wind energy Answer: (b) Nuclear energy ✅ Nuclear energy comes from nuclear fission, not from the sun’s energy. Q3. Which of the following is not an example of a bio-mass energy source? [HSLC’19] (i) Wood (ii) Nuclear energy (iii) Gobar gas (iv) Coal Answer: (ii) Nuclear energy ✅ Nuclear energy does not come from biomass; wood, gobar gas, and coal are biomass-based. Q4. Which one of the following is an example of non-conventional source of energy? [HS...

  Chapter: 9 — Heredity and Evolution HSLC Exam Questions A. MCQ & Very Short Questions: Mark : 1 (i) The organs having different origin, similar appearance and similar function are — [HSLC’16] (a) Homologous (b) Analogous ✅ (c) Adjacent (d) Vestigial Answer: (b) Analogous (ii) During the course of evolution, the process by which the characteristic features of the members of a species modify due to the influence of various factors and thus give rise to the organisms with new characteristic features is called — [HSLC’19] (a) Speciation (b) Evolution ✅ (c) Inheritance (d) Variation Answer: (b) Evolution (iii) An example of homologous organs are — [HSLC’23] (a) Wings of a bird and a bat (b) Wings of a butterfly and a bat (c) Wings of a pigeon and hands of man ✅ (d) Wings of a parrot and a honey bee Answer: (c) Wings of a pigeon and hands of man (iv) Which of the following chromosome sets will determine the male sex in a human infant? [HSLC’23] (...