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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.
1. Hazard Is An Extreme Event Whereas Disaster Is Its Consequence. 2. A hazard can occur without human interference but it may become a disaster on account of careless
Define two ways in which genetic recombination occurs during meiosis. Genetic recombination happens during crossing- over and independent assortment.
plants
If jean-Baptiste de Lamarck was correct, than a. Natural selection would lead to the spread of favourable traits within a population b. Finches that stretched their beaks to access
Q. Destruction of microorganisms? Ans. Destruction or control of growth of microorganisms is the basis of food preservation. To 'preserve' actually means fro keep safe, r
AGEING - The appearance of some changes as the body grows older is called ageing. It ultinately leads to death. It can be defined as deteoration in structure and function of
Q. Doppler evaluation for constrictive pericarditis ? 2D Echocardiography and Doppler evaluation can provide valuable clues to the presence of constrictive pericarditis. M-Mo
Planting bacteria gardens When the bacteria gardens have cooled place them out on the table but do not increase the glass covers unless you are ready to plant them. Toothpicks
Q. What are the main characteristics of the age pyramids of developed countries? In the stabilized human population the age pyramid has a narrower base since the reproduction r
Which of the following occur in response to an increase in the length of the right knee extensors in response to a quick tap applied to the right patellar tendon? An increase in t
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