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.
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..
Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..