Question

Daphnia is an example of
(a) Water flea
(b) Tadpole shrimp
(c) Fairy shrimp
(d) Clam shrimp

Answer 1

Hint: These belong to the class- Branchiopoda and is the common name of Cladocera. They are of phylum Arthropoda. So far, over 650 species, with much more undescribed, have been recognized. Most species of cladocerans live in freshwater and other bodies of inland water, with only eight species being very oceanic.

Complete step by step answer:
Water flea: They first appeared before the Permian period, and most freshwater ecosystems have been invaded since then. Some have also adapted to ocean life, the only Branchiopod members to do so, even though most Anostracans live in hypersaline lakes.
Most are 0.2-6.0 mm (0.01-0.24 in) long, with a down-turned head with a single median compound eye and a carapace that covers the thorax and abdomen that tends to be unsegmented.
 Cyclical parthenogenesis occurs in most species, where asexual reproduction is often complemented by sexual reproduction, producing resting eggs that allow the species to survive harsh environments and spread to distant habitats.
Let’s now learn in detail about water fleas.
So, the correct answer is ‘water flea’.

Additional information:
Tadpole shrimp: The Notostraca order includes the Triopsidae single-family, comprising the tadpole shrimp or shield shrimp. Triops and Lepidurus, the two genera, are considered living fossils, having not modified substantially since the Triassic in outward shape. They reach maturity within approximately eight days and lay eggs. As the pools dry up, Adult Triops die. If the pool does not dry up, Triops usually live for about 20-90 days.
Fairy shrimp: One of the four orders of crustaceans in the Branchiopoda class is Anostraca; its members are also known as fairy shrimps. Throughout the world, they live in vernal pools and hypersaline lakes and have been found also in deserts, ice-covered mountain lakes, and Antarctic ice. Typically, they are 6–25 mm long.
Clam shrimp: Clam shrimp is a taxon that resembles the unrelated bivalve molluscs of bivalved branchiopod crustaceans. They exist, and are known from the fossil record, from the Devonian period at least, and maybe before.

Note: So, what happens when they bite humans? Actually nothing much. They are non-venomous and their bites don’t last long. In general, they do not go around and bite humans but it might happen in some situations, so there is nothing to worry about.