In the early days of germ theory, contagious diseases were thought to be caused only by fungi or bacteria. In the 1890s, Dmitri Ivanovski filtered extracts from diseased tobacco plants and discovered that the disease could be transmitted to new plants through the filtrate. He hypothesized that something smaller than bacteria or fungi was responsible for the transmission of the disease.
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Biology, 21.06.2019 18:30, danielleepham
Astudent conducts an experiment to determine how the amount of water given to a plant affects it growth what is the dependent variable for this experiment
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Biology, 22.06.2019 13:00, collinpeterson21
Plz ! what does it mean for an allele to be dominant?
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Biology, 22.06.2019 19:20, mildred3645
Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. does this process require energy from the cell? this is an example of what type of molecular movement?
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In the early days of germ theory, contagious diseases were thought to be caused only by fungi or bac...
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