10th
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- Write definations b) Nutrients Nutrients: the substances in food that the body uses to obtain energy, and for growth, repair and control of body functions. Main nutrients... 1
- Write definitions. a. Nutrition. Nutrition: the process of taking in food and using it to obtain energy and materials for growth, repair and maintenance of the body. It incl... 1
- Fill in the blanks and explain the statements. a. After complete oxidation of a glucose molecules, ---- --- --- number of ATP molecules are formed. a. 38; b. 2 (pyruvic acid); c. pachytene; d. metaphase; e. phospholipid; f. anaerobic a. After complete oxidation of one glucose molecule, 3... 1
- Write evolutionary history of modern man. The evolutionary history of modern man: Approximately 7 crore years ago, the dinosaurs disappeared completely. At that time, monkey-like ani... 1
- Define fossil. Explain importance of fossils as proof of evolution Fossils offer palaeontological evidence for the evolutionary process. Due to some natural calamities the organisms get buried during ancient... 1
- Explain with suitable examples importance of anatomical evidences in evolution Anatomical evidences show that organisms which look different and do different work have the same basic internal structure, which means they... 1
- Explain the theory of evolution and mention the proof supporting it The theory of evolution says that present-day organisms have developed gradually from simpler ancestors over a very long time, and the main... 1
- Explain the process of formation of complex proteins. Complex proteins are formed by protein synthesis, which takes place in three steps: transcription, translation and translocation, followed b... 1
- How are the hereditary changes responsible for evolution? Answer: Hereditary changes (variations in genes) are passed from parents to offspring. Over many generations, useful variations accumulate i... 1
- Define vestigial organs. Write names of some vestigial organs in human body and write the names of those animals in whom same organs are functional. Vestigial organs are organs that are reduced and non-functional (useless) in an organism, but are fully developed and functional in some oth... 1
- Define heredity. Explain the mechanism of hereditary changes. Heredity is the transfer of characters (traits) from parents to offspring, generation after generation. Hereditary changes arise when the ge... 1
- short note on Connecting link Some plants and animals show some morphological character by which they can be related to two different groups they can be called connecting... 1
- short note on Evolution Evolution is the gradual change in living organisms over a very long period of time, by which new species are formed from earlier ones. Life... 1
- short note Embryology. Comparative study of embryonic developmental stages of various vertebrates show extreme similarities during initial stages and those similar... 1
- short note Darwin’s theory of natural selection. Darwin's theory of natural selection states that organisms with favourable variations survive and reproduce more, and over generations this... 1
- Short note on Lamarckism 1=Jean-baptiste lamarck proposed that morphological changes occurring in theorganisms are responsible for evolution 2=The reasons behind tho... 2
- Complete the statements by choosing correct options from bracket. (Gene, Mutation, Translocation, Transcription, Gradual development, Appendix) a. Mutation; b. Gene; c. Transcription; d. Gradual development; e. Appendix a. The cause of sudden changes was understood due to the mutatio... 1
- Read the following statements and justify the same in your own words with the help of suitable examples. a. Human evolutio All four statements describe evolution: a. humans evolved gradually over crores of years; b. isolation leads to new species; c. fossils are... 1
- Complete the following diagram. Morphological Similarities in bones structure Evidences of Evolution Evidences of evolution: morphological evidences, anatomical evidences (similarities in bone structure), vestigial organs, palaeontological e... 1
- Following are the pictures of some disasters. How will be your pre- and post-disaster management in case you face any of those disasters?
- Complete the following chart. Properties of Predisaster management Properties (features) of pre-disaster management: Planning: studying the disasters likely in an area and preparing a disaster management pla... 1
- Explain that why is it said like that? A] Mock drill is useful B] Effective disaster management makes us well prepared for future. A] Mock drill is useful because it trains people to act correctly in a real disaster. B] Effective disaster management makes us well prepare... 1
- Some symbols are given below. Explain those symbols. Which disasters may occur if those symbols are ignored?
- Identify the type of disaster. a. Terrorism b. Soil erosion c. Hepatitis d. Forest fire e. Famine f. Theft a. Terrorism: man-made; b. Soil erosion: natural; c. Hepatitis: natural (epidemic); d. Forest fire: natural; e. Famine: natural; f. Theft: m... 1