? Organisms in nature can be divided according to the number of cells. Those composed of only one cell are unicellular organisms, while those composed of multiple cells are multicellular organisms. Single-celled organisms have only one cell, so it is difficult to observe with the naked eye, only with the help of microscopes and other tools can be observed. Daphnia, on the other hand, are not unicellular organisms. They belong to the crustacean class under the phylum Arthropoda. They are crustaceans and are composed of many cells. Although water fleas are small in size, they can be observed by humans with the naked eye.
The most common single-celled organisms, such as yeast and Chlamydomonas, are organisms composed of a single cell, which can not be observed by humans without tools. Only under the microscope and other tools can their structure be seen clearly.
do water fleas live? Water fleas belong to crustaceans among arthropods. From the distribution range, in fact, water fleas are widely distributed in the world, almost all over the world, and can also be cultured artificially. From the specific living environment, most of the water fleas live in fresh water, which is common in ponds and lakes, and the water fleas living in these places are easy to become food for various fish. However, not all water fleas can only live in fresh water. Species such as Cyclops vicinus have better adaptability to high salinity and can live in high salinity seawater.
