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Q. What is parthenogenesis?
Parthenogenesis is the formation or reproduction of a new individual from the egg cell but without fecundation by the male gamete. According to the species, individuals born by parthenogenesis may be female or male, or of any sex.
In bees the females (queen and workers) are diploid and while the drone (the single male bee) is haploid born by parthenogenesis.
Describe the appearance of a single E. coli colony. Why can it be considered genetically homogenous?
Full - thickness flap with a c-shaped excisional incision In case where there is adequate soft tissue, both in terms of papillary height and labial bulk, the excision of the ep
What is the mechanism described by Darwin that eliminates species less adapted to environmental conditions? The mentioned mechanism is the natural selection.
a) In humans, is it the sperm or the ovum which verifies the sex of the offspring? b) Give a reason for your answer. (a) The sperm verifies the sex of the off
Q. What is the endosymbiotic hypothesis about the origin of mitochondria? And what are the molecular facts that support the hypothesis? And To which other cellular organelles can t
what is the differences between spherical symmetry and radial symmetry
Q. What are the three fundamental sexual life cycles studied in Biology? Which of them corresponds to metagenesis? Which of them is the human life cycle? Sexual reproduction ma
explain spermatogenesis
Embryonic Development The embryonic stage extends from the second week by the 8th week and is charactrised by formation of placenta, the development of internal organs and ap
Chemical bonding : The present matter of earth contains atoms bound in groups of two or more called molecules. Their binding capacity is called chemical reactivity; It depends upo
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