Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment. To generate heat, warm-blooded animals convert the food that they eat into energy. Peacock and camel are warm blooded animals.
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.
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