Biology Class 11 Chapter 1 Notes

• Our comprehensive Biology Class 11 Chapter 1 Notes will ensure you're fully prepared for your exams.
• Important Multiple Choice Questions for MDCAT Preparation.
• What do you mean by Hypothesis?
• How does Law differ from theory.
• What is deduction/deductive reason?
• Define Vaccination.
• Write a short note on cloning.
• Differentiate between Organ and Organelles.
• Differentiate between Organ formation in plants and animals.
• Differentiate between Population and Community.
• Define theory. Give important features of a good theory.
• Differentiate between Deductive and Inductive reasoning.
• How and when a Hypothesis becomes a theory?
• Name of the four Eras of Geological Time Chart.
• What is integrated disease management?
• Differentiate between Biome and Biosphere.
• Give four characteristics of living organism?
• What is pasteurization. Give its application.
• What is meant by phyletic lineage? How new species arise?
• What is hydroponic culture technique. What are its advantages and applications?
• Differentiate between Biological control and Bioremediation.
• Differentiate between Hybridization and Cloning.
• Differentiate between Hypothesis and Theory.
• Define fossil. Also give significance of study of fossil.
• Differentiate between Anatomy and Morphology.
• Differentiate between Marine water biology and Fresh water biology.
• Differentiate between Chemotherapy and Radiotherapy.
• What is gene therapy.
• Differentiate between Biotechnology and Molecular Biology.
• What are Bio-elements and give their propotion in human body.
• What is molecular level in organization level of organism. Differentiate between Micro molecules and Macro molecules.
• Define population with examples and also give its attributes.
• How science of biology helping mankind?
• Which one of the following is a correct sequence in biological methods?
• Which one of the following is employed in treatment of cancer?
• Which one of the following is not a viral disease?
• what do you mean by hypothesis? Ans: Hypothesis: A statement made on the basis of observation, data, experience and background knowledge of event is called hypothesis. OR An observer organizes observations into data form and gives a statement as per experience and background knowledge of the event. This statement is the hypothesis. • Or hypothesis is the statement made by a scientist on the basis of observation or available information. • It is tentative explanation of observations. • It is a statement which is to be tested.
• define vaccination. Ans: Vaccination: In vaccination, vaccines (inactive or weakened bacteria or viruses or their toxins) are inoculated to as to stimulate the production of antibodies or lymphocytes. OR • It is an artificially induced passive immunity. • Edward Jenner first developed the technique of vaccination in 1796. 
• Write a short note on cloning. Ans: Cloning: Cloning is the production of genetically identical copies of organisms/cells by asexual reproduction. • Cloning is a technology for achieving eugenic aims. • A clone is defined as a cell or individual and all its asexually produced offspring. • All members of a clone are genetically identical except when a mutation occurs. • Generally no normal animal reproduced naturally by cloning. Several insects and many plants do, in some circumstance whereas few do so regularly. • In 1997 scientists in Scotland succeeded in cloning a sheep. In this procedure the nucleus from a fertilize egg is removed and a nucleus from a cell of a fully developed individual is inserted in its place. The altered Zygotes is then implemented in a suitable womb where it completes its development. The new individual formed in this way is a genetically identical clone of the individual whose nucleus was used. Thus cloning could make multiple copies of a desired genotype.