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8). Darwin published his theory of evolution with compelling evidence in his 1859 book On the Origin of Species, overcoming scientific rejection of earlier concepts of transmutation of species.
9).a. Kala-azar is caused by infection with leishmania parasites.
b. Bacterium Propionibacterium acnes, which is normally present on the skin causes acne vulgaris.
10). Antibacterials fight infectious bacteria in the body. They attack the disease process by destroying the structure of the bacteria or their ability to divide or reproduce. Antibiotics affect those things that bacterial cells have but human cells don't. Thus, harming the bacteria and not the human.
11). the slope of speed over time is acceleration. Acceleration can be either positive or negative. The acceleration can be graphed by taking the derivative of the speed/time function and plotting the points on what would be the acceleration/time graph.
12).option (d) is correct as its SI unit is metre, m.
13). Sun- Solar Thermal energy
14). A resource is anything that we can use to satisfy our needs. A natural resource is one which we obtain from our natural environment.
15). option (c) is the correct one.
16). Sustainable agriculture is a type of farming that focuses to fulfil the needs today's society without compromising the needs of future generations.
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