Diagram based worksheet of " How do organisms reproduce"
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Evidences of Evolution - notes
Origin of Life: Evolution can explain formation of many species ultimately from a single species in the past. But origin of life (first species) needs further explanation. Oparin and Haldane proposed biochemical theory of evolution : Chemical evolution : Formation of simple organic substances (amino acids, glucose, nucleotides) from inorganic substances CH4, NH3, H2S on primitive Earth. Biological/ Organic Evolution : Formation of first primitive cell using organic molecules. Evolution of different forms of life forms from simple unicellular prokaryotic organism Miller and Urey experiment : They simulated primitive earth. Primitive reducing atmosphere Gases like H2S, NH3, CH4 Evaporation from hot oceans Boiling water in flask Lightening ...
Notes:- Life processes - Circulation and Excretion
Transportation Transportation in human beings - Components of Circulatory system: a)Heart b) Blood vessels c) Blood § Heart - (Refer to figure 6.10 page no. 106 of N.C.E.R.T Text book) (i) It is a muscular organ, which works as a pump in the circulatory system. (ii) It is the size of our fist. (iii) It has two sides, which are separated by a partition so that the oxygenated and deoxygenated blood do...
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