Fertilization is the process in which a single haploid sperm fuses with a single haploid egg fuse to form a zygote.
An animal zygote under go mitosis and divides to form a hallow ball of cells called blastula.
Pilibhit wildlife sanctuary is located in Uttar Pradesh.
Cuttlefish or cuttles are marine animals of the order Sepiida. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone. Despite their name, cuttlefish are not fish but molluscs.
Jellyfish are soft bodied, free-swimming aquatic animals with a gelatinous umbrella-shaped bell and trailing tentacles.
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