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Q. Describe Palynological Evidence?
Palynology is the study of pollen and spores. The taxonomic characters of pollen grains include wall structure, polarity, symmetry, shape and grain size. In angiosperms pollen grains are of two kinds viz. Monocolpate and tricolpate. Monocotpate pollen grains are boat shaped, have one long germinal furrow and one germinal aperture. This is characteristic of primitive dicotyledons and majority of monowtyledons. According to some palynologists the first flowering plants had monocolpate pollen grains. Tricolpate grains are globose, symmetrical, have three germinal apertures and are characteristic of advanced dicotyledons.
Nemerteans - Regeneration in Invertebrates Nemerteans as well possess remarkable regenerative ability, as even a small fragment can regenerate into a complete worm. Nemerteans
what are golgi apparatus
Asexual Reproduction in Animals Reproduction may be referred as production of true copies. Most of the animals that are quite familiar to us generate male and female gametes (
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Blastocyst is the developmental stage of fertilized ovum by the time it is prepared to implant; formed from morula and comprises of an internal cavity, an inner cell mass, and an
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