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What is adaptive convergence?
The Adaptive convergence is the phenomenon by which living beings facing the same environmental pressure (problems) and undergoing genetic variability and natural selection incorporate structures (solutions) and similar (analogous) organs into their bodies during evolution. For instance, the fins and the hydrodynamic body of dolphins and fishes phylogenetically distant animals.
Tissue Valves : Tissue valves mounted on a frame with a sewing ring are inserted by the same technique as used in the case of prosthetic valves.
genral charecter and classificatin of porifera
Chromosomes are the condensed, fibrillar, self- replicating genetic structures of cells containing the cellular DNA which bears in its nucleotide sequence the linear array of gene
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Functions of Testis The testis performs the following two functions: Proliferation of spermatozoa and Secretion of steroid hormones
What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?
Vegetative Development - Growth It is quantitative and irreversible change. It reflects an increase in size and volume of an organism. For example, the change in the size of a
Capacity to do work is known as energy. It is very important input for all our activities like cooking food, driving vehicle and running industries. The most important challenge th
Q. What hormone can be used to overcome jet lag? Jet lag takes place when an individual's biological clock is out of sync with local time. According to general rule it takes ab
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