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Q. Which type of cell came first in evolution - the eukaryotic cell or the prokaryotic cell?
This is an interesting problem of biological evolution. The majorly accepted hypothesis asserts that the prokaryotic cell, the simpler cell, appeared earlier in evolution than the more complex eukaryotic cell. The endosymbiotic hypothesis, for instance, affirms that aerobic eukaryotic cells appeared from the mutualist ecological interaction between aerobic prokaryotes and primitive anaerobic eukaryotes.
Define some Detrimental Effects of Fungi? These cause diseases of animals and humans. These either cause superficial mycoses (infection of skin, hair and nails) or systemic
On average what is the life duration of the red blood cells? Where are they destroyed? What is the destination of the heme groups after the destruction of hemoglobin molecules?
Explain Photolithoautotrophs - Nutritional Types of Microorganisms? These microorganisms use light as an energy source, inorganic substance as electron source and CO 2 as the
Active transport is the transport of the molecules against the concentration gradient (from area of low concentration to area of high concentration) with the help of proteins in t
I need help with p-p, q-q and r-r intervals and heart rates
Wildlife - Ecology The term wildlife probably originated in 1913 in a book, Our Vanishing Wildlife by William Hornaday, Director of the New York Zoological Park. The main focu
Explain Negative Staining Technique? Here, a stain has a negatively charged chromophore that is repelled by the negative bacterial surface. It results in indirect staining of m
Structure of HIV HIV is a spherical enveloped virus of about 90-120 nm diameter .In nucleocapsid is icosahedral. Its genome consists of a single stranded RNA filament segmented
Q. What are the major events of the final mitotic period? The final mitotic phase is the telophase. In the telophase the following events occur decondensation of chromosomes ea
Determine the term - essential element It becomes difficult to meet all the conditions so as to establish essentiality. This is particularly so for the elements that are requir
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