Biology, 29.10.2019 01:31 jinjuwdjesus
In the early days of germ theory, contagious diseases were thought to be caused 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 concluded that the disease was caused by particles smaller than bacteria: the tobacco mosaic virus.
which best explains how ivanovski's work led to a change in the germ theory?
he tried to promote his hypothesis as a law.
he used a new experimental method to test his hypothesis.
he used a more powerful bacterial strain than other scientists had.
he obtained results that confirmed what other scientists were thinking
Answers: 2
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Biology, 22.06.2019 18:00
The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .
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Biology, 22.06.2019 20:30
Which best describes somatic mutations? they are usually passed on to offspring. they can cause different kinds of cancer. they always result from point mutations. they only occur in reproductive cell
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In the early days of germ theory, contagious diseases were thought to be caused by fungi or bacteria...
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