The whip-tail lizard is one a handful of animals which reproduce asexually. Jellyfish, sea anemones and corals are others among the asexually reproducing strands. Asexually reproducing creatures have a disadvantage when it comes to environmental adaptation because successive generations are essentially clones, with small amounts of genetic mutation happening ever so often.
There are a few types of asexual reproduction. Jellyfish and coral reproduce by ‘budding’ – essentially, the offspring are a growth on the adult that breaks away to become an independent organism.
Some worms fragment; as they grow older, they will spontaneously break into several pieces, each of which becomes a full worm.
In parthenogenesis, females lay eggs that develop without being fertilized. This occurs with some species of fish, frogs, and lizards. Often this is not the primary reproductive method, but rather a result of extreme circumstances. Kimodo dragons are able to reproduce parthenogenically if there are no males present. Many insects reproduce this way. Some wasps will reproduce parthenogenically if they become infected with a bacteria that passes to new generations through the egg; they become males if the egg was not fertilized, but females if the egg was fertilized.
Aphids, or greenflies, could reproduce asexually. In one season, it is estimated that a single aphid can reproduce 600 billion aphids (assuming the environment is favorable and disease is none). The female aphids from birth do not need males to reproduce, and after a few weeks from hatching from their eggs, females reproduce even more females.
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