notochord
(Science: embryology) An axial mesodermal tissue found in embryonic stages of all chordates and protochordates, often regressing as maturity is approached. Typically a rod shaped mass of vacuolated cells. It lies immediately below the nerve cord and may provide mechanical strength to the embryo.
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
In this tutorial, find out more about certain types of inheritance that does not follow the Mendelian inheritance patter..
While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..
This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..
Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..