protozoan cyst
infectious form of many protozoan parasites such as entamoeba histolytica, giardia lamblia, balantidium coli, etc., usually passed in the faeces and provided with a highly condensed cytoplasm and resistant cell wall.
The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..
Meet the colorful takahē, an extremely rare flightless bird. Find out more about its unique features and why they matte..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..