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Which type of cell came first in evolution the eukaryotic cell or the prokaryotic cell?
Ans) This is an interesting problem of biological evolution. The most accepted hypothesis asserts that the more easy cell, the prokaryotic cell, appeared early in evolution than the more difficult eukaryotic cell. The endosymbiotic hypothesis, for example, affirms that aerobic eukaryotic cells appeared from the mutualist ecological interaction among aerobic prokaryotes and primitive anaerobic eukaryotes.
Which of the following processes assist in the maintenance of high levels of dissolved solutes in the interstitial spaces of the kidney medulla? A. Net flux of sodium ions from
Enzymes work to speed up a chemical reaction by: a. attaching coenzymes to the substrate b. heating up the substrate c. lowering the activation energy of the reaction d. supplyi
What are the factors that for influencing photosynthesis also interfere with the gross primary productivity? Mostly water and light, but also mineral salts, temperature and car
What characteristics might a breeder select for in (i) a cereal crop, (ii) a farm animal? (i) In a cereal variety, a breeder might select for high yield; disease-, frost- or dr
Risk Assessment of Biological Hazards Biological hazards of concern to public health include pathogenic strains of bacteria, viruses, helminths, protozoa, algae and certain tox
What is cardio vasular examination in hheart disease? Cardio-vascular examination: A thorough and systematically cardio-vascular examination provides valuable clues to the pr
biological significant of a skeleton
Septa prevent oxygenated and deoxygenated blood. Give reason
Q. What is Acute Aortic Regurgitation? Infective endocarditis, aortic dissection and trauma often produce severe AR. Acute increase in left ventricular end diastolic volume es
Q. What do you mean by Nervous System? Structural Organization: CNS + PNS Functional Organization: only concerned with PNS Sensory (Afferent) -> CNS Motor (Effe
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