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What is the spontaneous generation hypothesis?
The spontaneous generation hypothesys, or abiogenesis, asserts that life on earth has come from nonliving material. For instance, the fact that with time rats appeared around waste was considered in the past a confirmation of this hypothesis. Some supporters of spontaneous generation associated it with the existence of an active principle (the vital elan) that would be the source of life, a theory called as vitalism.
Origin of Life - Image Diversity: abiogenesis
Q. How much DNA is in a typical human cell? If DNA (deoxyribonucleic acid) molecules in a single human cell were stretched out and laid end to end they will measure approximate
Phytoflagellates – Protozoan Phytoflagellates are autotropbs that possess chlorophyll or other related pigments, and store food as fats, oils and starches (other than glycogen
characters of phylum protozoa
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Q. What is Parkinson's disease? The Parkinson's disease is a degenerative disease of the nervous system in which the major manifestations are progressive motor disturbances, li
There are several methods by which a disease-causing organism can be transferred from the reservoir to the host organism. Direct contact : Disease - causing organism may be tr
Q. Why are transgenics considered a threat to the environmental safety? The Transgenics can be dangerous to the whole biosphere since the transfer of genes between species may
Spermatogenesis In multicellular organisms the reproductive process commences with the production of gametes. The gametes are the sex cells that develop inside the gonads, th
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In school laboratory, what is usually regarded as evidence that photosynthesis has occurred in a plant
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