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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.
What is Loud P2 in second heart? It occurs in pulmonary hypertension. In absence of pulmonary hypertension, it occurs when pulmonary trunk is dilated as in Ostium Secundum, ASD
Q. What are the cells with a delimited nucleus called and what are the major elements of the nucleus? Cells with delimited nucleus are known eukaryotic cells. Organisms compose
What is meant by terminal electron acceptor? Give examples of e acceptors for aerobic and anaerobic respiration.
Define Essential Parts of Photocolorimeter - Monochromators? This is a means of selecting a sufficiently narrow waveband. Early colorimeters used glass filters that transmitted
What is Congenital Mitral Stenosis ? The onset of symptoms or signs depends on severity of the stenosis, severe the stenosis earlier the presentation. With significant MS, the
Explain Precautions for Morphological Study of Fungi? 1. Use sterile forcep and needles for slide culture technique. 2. Aseptic conditions should be maintained. 3. Caref
Which one of the following is not a lateral meristem? 1. Intrafascicular cambium 2. Interfascicular cambium 3. Phellogen 4. Intercalary meristem Intercalary m
Define the Estimation of Haemoglobin in Blood? Several methods are used to determine haemoglobin. In these methods hemoglobin is measured as oxyhaemoglobin, carboxyhaemoglobin,
Diploidy and Haploidy :: In the chromosomal complement given species not all the chromosomes are different from each other .In fact these are in pairs ,i.e. every two chrom
Define Vigorous or vigorously active lifestyles - physical activity? These people engage regularly in strenuous work or in strenuous leisure activities for several hours. Examp
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