Hydra
(Science: organism) genus of freshwater coelenterates (cnidarians). They are small, solitary and only exist in the polyp form, which is a radially symmetrical cylinder that is attached to the substratum at one end and has a mouth surrounded by tentacles at the other. They have considerable powers of regeneration and have been used in studies on positional information in morphogenesis.
A running water environment offers numerous microhabitats for many types of animals. Similar to plants, animals in lotic..
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..
Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..