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Q. Show the Embryological Evidence?
Embryology is the study of the successive stages of sporogencsis , gametogenesis and the growth and development of the embryo. The number of nuclei in the pollen grains at the time of pollen dispersal is either two or three. Double fertilisation is an example of embryological unity throughout the angiosperms. Based on the number of cotyledons, monocotyledons are separated from dicotyledons. The binucleate pollen is derived. Embryology has had systematic significance in the grass family, where with several other characters it has been used to revise the family's classification. In animals the embryological evidence is of great significance, e.g. the Anopheles maculipennis complex is broken into a number of sibling species on the basis of their egg structure. In Dacus oleae and ceratitis capitata.(fruit flies) the whole eggs are separated on the basis of the character of anterior pole and the whole classification of white flies is primarily based on the structure of their pupae.
In an investigation to compare the rates at which starch is being broken down by an enzyme (a) what test is used (b) how do you know when the reaction
bloodpressure will be more in _ in than in_
Overall senescence - Senescence Only the parts above the ground level i.e. The aerial parts die whereas the underground parts survive For example, potato.
Yeast is cultured in the presence of radioactive phosphate and the following biological molecules are purified. Which molecule should be most radioactive? A. An oligosaccharide B.
What is the water cycle? The water cycle represents the circulation and recycling of water in nature. Liquid water on the planet surface is heated by the sun and turns into
mode of nutrition in follow animal lizard,bird,grasshopper,rat
Explain about the Gel bands detection techniques? Gel bands, resulting from a gel electrophoretic separation, may be detected by staining, radioactive counting or immunoblottin
How does classifying animals based on similarities and traits help future scientists
Define Genetic Susceptibility Factors for Obesity? Some people inherit a tendency to become fat. Earlier, it was thought that genetic inheritance ranged from 66% to 80% but now
Q. What is Stenotic and regurgitant lesions? The normal cardiac valves offer little resistance to blood flow even when flow velocity is high. When stenosis develops, the valve
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