Daphnia - Arezoo Abdollahi
The body of Daphnia is usually 1–5 millimetres long.The head is fused, and is generally bent down towards the body with a visible notch separating the two.The most prominent features are the compound eyes, the second antennae, and a pair of abdominal setae.In many species, the carapace is translucent or nearly so and as a result they make excellent subjects for the microscope as one can observe the beating heart.
Most Daphnia species have a life cycle alternating between parthenogenetic (asexual) reproduction and sexual reproduction. Under typical conditions, these eggs hatch after a day, and remain in the female's brood pouch for around three days. They are then released into the water, over 5–10 days before reaching an age where they are able to reproduce.
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