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A zygote undergoes rapid cell divisions (cleavage) to form a spherical ball of cells: the blastula; this will further develop into a blastocyst. Does meiosis form a zygote? Meiosis is where a diploid cell gives rise to haploid cells, and fertilization is where two haploid cells (gametes) fuse to formRead More →

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Hemiparasites may be facultatively parasitic only; they derive water and minerals from their hosts, as well as nutrients, but have retained some of their photosynthetic ability. Holoparasites are obligate parasites that have lost all chlorophyll, and that cannot assimilate carbon and inorganic nitrogen on their own. What is an obligateRead More →