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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
why sporophyte of psilopsida is rootless
Xerarch - Kinds of Succession When the succession takes place in drier area, i.e., the succession progresses from xeric to mesic conditions. It is further subdivided as:
Mr. Smith read that cholesterol was bad for his health so he eliminated all foods and food products containing this molecule. He later found that his cholesterol level dropped only
What is the secondary structure of a protein? The secondary protein structure is formed by the manner its amino acids interact by the intermolecular bond. These interactions ma
Agarose gel electrophoresis is the method to analyze the size of the DNA (or RNA) fragments. In the presence of an electric field, bigger fragments of DNA move through a gel slowe
harmful and beneficial usesa of phylum porifera
Preadmission Preparation Preadmission preparation is most effective when the admission is planned and there is enough time for the nurse to provide necessary information to
Explain about the Integumentary Tissues? The skin, hair and nails covering and protecting the body are the intengumentary tissues. Depigmentation of hair and wrinkling of skin
Vitro Fertilization - Human Development In case a woman cannot conceive due to her uterine tubes are blocked she can become pregnant by means of in vitro fertilization. In thi
Leaf silhouettes Place a leaf on a sheet of white paper and hold it securely with thumb or finger. Press a piece of natural or artificial sponge next to an ink pad. With short,
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