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Q. How are gametes formed in the pteridophyte life cycle, by mitosis or meiosis? What is the type of meiosis that occurs in pteridophytes?
In pteridophytes gametes are made by mitosis from special cells of the gametophyte. As in pteridophytes, in all plants, meiosis is sporic, that is cells of the sporophyte undergo meiosis and generate spores that then by mitosis develop into the gametophyte.
In patients who have not received prior antibiotics and who will ultimately have blood culture positive endocarditis, it is likely that 95 - 100 per cent of all cultures obtained w
Freshwater Animals In Figure you have seen that the body fluids of freshwater animals are hyperosmotic to their aqueous surroundings. This results in two-kinds of osmotic prob
Q. Describe Induced Ventricular Arrhythmias? The prognostic significance of ventricular ectopy provoked by stress testing after an MI is controversial. Complex ventricular arrh
Determination of vitamin B 12 Spectrophotometric determination of the characteristic ultraviolet absorption is suitable for the determination of pure vitamin B 12 or of pure
Carbohydrates are the next important nutrients as they have to perform a variety of functions such as: 1) Provide major source of energy 2) Breakdown of fatty acids and preve
Q. How does the male gamete penetrate the egg cell? How does the female gamete protect itself from the entrance of more gametes after the entrance of the first sperm cell? The
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Benefits of Cross-Pollination Because of the specific benefits of cross-pollination, flowering plants have evolved many devices to prevent self-pollination and to encourage cr
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