Examination Hall, A. B.C. (City), September. 9, 2003. The Editor, The News, Lahore. Sir, I crave the hospitality of your columns to call the attention of the Government to a big problem of today. It is observed that some students use unfair means in the examination. Sometimes they bribed the invigilators. Many times, they frighten, […]
Or Heroism And Gallantry Of Santiago Significance of fish Q1: Nothing is easy says the old man in the novel. This is what Hemingway wants us to learn that every man has his challenges in life to meet. Discuss in terms of The Old Man and The Sea. Or What do you know about the […]
Magnesium reacts with chlorine to form the ionic compound magnesium chloride . ( e ) Draw a ‘ dot and cross ‘ diagram to show the bonding in magnesium chlo ride . You only need to draw the outer ( valence ) electrons of magnesium and of chlorine . ( b ) The physical properties […]
Helium-6 and Helium-7 are isotopes. the nucleon number(mass number) of helium-6 is 6 and of helium-7 is 7. (a) What is the meaning of the term isotopes? (b) compare the number of the electron, proton, a neutron in one atom of helium-6 and one atom of helium -7 (c) Explain why helium does not react […]
Cellular respiration It is the process in which the C-H bonds in food are broken by oxidation reduction reactions and the energy is transformed into ATP. Breathing It is used for the process through which animals take air in their bodies to get oxygen from it and then give out the air for getting rid […]
Homeostasis Homeostasis may be defined as the maintenance of the internal condition of body at equilibrium, despite change in the external environment. Body cells need the internal environment in which conditions do not change much. Stable internal conditions are important for the efficient functioning of enzymes. Difference between osmoregulation and thermoregulation. Osmoregulation Is defined as […]
For their activities, organisms need energy in the form of (a) glucose (b) DNA C. sugar (d) ATP The process in which the C — H bonds in food are broken by oxidation reduction reactions and the energy is transformed into ATP is called transportation cellular digestion cellular respiration excretion Which of these is produced […]
The optimum temperature for the germination of seeds of most ranges from – to (a) 15°-20° (b) 20-25° (c) 25-30° . (d) 30-35° What is the future of ovary after fertilization in flower? (a) seed (b) seed coat (c) fruit (d) all these Embryo in flowering plants consists of (a) radicle (b) plumule […]
h. Most cells die after 20-50 cell divisions but cancer cells are believed to be immortal.
Q: What is biological method of study? Answer: Science is the systemized knowledge derived from observation and experiments carried out to determine the principle about how nature operates. BIOLOGICAL METHOD OF STUDY: The scientific method, in which biological problems are solved, is termed as biological method. It comprises the steps a biologist adopt in […]
Cell theory is the basis for the way that biologists study living things. Cell Theory is the most basic condition for determining if something is living. Modern Cell theory 1. All living things are made up of cells. 2. Cells are the basic units of structure and function in living things. 3. cells arise only by divisions […]
MCQ: Metals difficult to oxidize are called weak metals strong metals noble metals none of above Answer MCQ: On contact with oxygen, Rubidium forms normal oxide per oxide super oxide none of above Answer MCQ: Most metallic among following is Na K Al B Answer MCQ: As we move across period electronegativity decreases increases remains same becomes zero Answer […]