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According to the theory of natural selection, what factor below contributed to the current variations in beak sizes of finch species on the Galapagos Islands? a. Finches dispersed to islands where their beak sizes closely matched available seed sizes b. Different finch populations needed to change in order to survive, so beneficial new traits arose c. Non-heritable variation between individual was important for natural selection to work d. Genetic drift allowed beneficial traits to spread throughout the population e. Seeds are limited resource.
What are DNA ligases? How do these enzymes participate in the recombinant DNA technology? The DNA ligases are enzymes specialized in tying the complementary DNA chains that for
What are the homologous and the heterologous portions of the human sex chromosomes? The Homologous portion is that in which there are genes having alleles in both X and Y sex c
Define Partition chromatography - basic separation technique? It is a technique in which separation is achieved as a consequence of the relative solubility of a substance in th
Determine Minerals Requirements at high altitude? Increased urinary excretion of Nat and K + on exposure to hypoxia is reported while some workers have found only increase in
Define Introduction of Lipids? You have studied that lipids together with carbohydrates and proteins are important as food for many animals. Lipids include neutral fats, phosph
CIRCUL A T O R Y SYSTEM IN COCKROACH Type is open or lacunar. i.e. b.v. absent. Organs are dipped in haemolymph. 1 . HAEMOLYMPH - Blood and lymph are mixed.
Of which substance do elastic fibers of the connective tissue are made? What are some functions of these fibers? The elastic fibers are made of a protein called elastin. Ela
Bubble Oxygenators: These have a mixing chamber where venous blood is collected and from the bottom end micro bubbles of oxygen are passed and as they rise to the top, gas ex
Q. What are the Common congenital heart disease? Fossa Ovalis ASD Commonest defect is fossa ovalis ASD. It can be closed by devices. ASD should be sized in various views
GLUCOSE IS OXIDISED TO PRODUCE ENERGY TO GIVE ADP TO FORM ATP
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