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Q. Phylogenetic systems of classification?
As already pointed out 'earlier that in Phylogenetic system, the plants are classified according to their evolutionary relationships. It is very difficult to claim that a phylogenetic system is perfect on the basis of evolutionary affinities due to incomplete fossils records and in such a situation the plants are classified on the basis of available data. The systems of classification by Engler and Prantl (1887-1915), Hutchinson (1926, 1934, 1969 and 1973) and by Takhtajan (1954, 1964, 1973, 1980) are Phylogenetic systems. We shall discuss these systems one by one in details.
Classification of proteins based on chemical properties? Depending on their chemical properties and optical activity, the amino acids in proteins are classified under the follo
What are persistent organic pollutants (POPs)? POPs, or persistent organic pollutants, are toxic substances formed from organic compounds. POPs are made in several industrial p
Explain Sexual Reproduction ? In most higher organisms, replication occurs by sexual reproduction. Sexual reproduction begins with a process called meiosis. The products of me
Nature of Stress - Responses of Plants to Stress As mentioned in the preceding section, stress can be considered as any deviation in environmental condition from optimal for t
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What do numeric pyramids represent? Numeric pyramids show the number of individuals in each trophic level of a food chain.
a) What conditions do most seeds need in order to begin germination? b) What other condition do the seedlings need to continue growth to mature plants? a) Most seed
Q. Why is the cerebellum more developed in mammals that fly or jump? The cerebellum is the main brain structure that coordinates the movement and the equilibrium of the body. F
The physician orders 2 liters of lactated ringers over 16 hours. The drip factor of the tubing is 20 gtt/cc. What will be the flow rate? a. 33.33 or 34 gtt/min b. 41.66 or 42
Indirect determination: By determining the weight of the filler on the dried filter paper you can calculate the weight of aspirin in each tablet: weight of acetylsalicylic ac
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