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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.
Energy Loss - Energy Flow Let us now take the second point that is the loss of some energy at each trophic level. You might recall that the second law of thermodynamics states
Q What is the fundamental structure of the HIV virus? What is the function of the glycoproteins of its envelope? HIV is an RNA virus in its core there are two strands of RNA an
Q. Can you explain Relation between Coronary Artery and Myocardial supply? Ans. There is a well-established relation between a given epicardial coronary artery and its myo
Group specificity Some enzymes prefer a specific functional group to be present\%on the substrate molecules. Example:- alcohol dehydrogenase acts on alcohols having -OH gr
what is human circulatry system
How are genetic diseases classified? The Genetic diseases classify into chromosomal abnormalities and genetic mutations. Between chromosomal abnormalities there are the aneu
Explain the Diet and Feeding Patterns of infants? In this section, we will learn about diet and feeding patterns of infants and the pre- schoolers. The discussion has been sub-
Q. What is tubular secretion? What are some examples of substances secreted through the renal tubules? Uric acid, Ammonia, potassium bicarbonate and hydrogen ions, bases and me
General characteristics of phylum
Phase (different interference) Contrast microscopy: Living cells are mostly transparent. For viewing under ordinary light microscope, therefore, live cells must be stained wi
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