Melanocyte 



Cells in certain animals that contain black pigment, 

 melanin, as in the chameleon. The contraction of the cells 

 makes the animal appear light in color, expansion makes it 

 appear dark. 



Melliphagous 



Refers to an organism that feeds on honey. 



Mendelian 



Refers to Mendel's laws (q. v.). 



Mendelian Population 



A group of individuals of a species that share in a 

 common Gene pool through reproduction, cf. Species, 

 Syngameon. 



Mendelism 



The knowledge of inheritance according to Mendel's 

 laws. 



Mendel's Laws 



The rules according to which characteristics of organisms 

 are inherited as stated by Gregor Mendel, such as characters 

 or factors (genes) act as units, dominance and recessiveness 

 of characters, the segregation of Alleles during meiosis, and 

 the independent assortment of alleles in each Gamete. 



Mercator's Projection 



A method of mapping in which the parallels of latitude 

 are drawn as straight lines of the same length as the equator. 



Meristem 



A tissue in plants that is concerned with division to form 

 new cells, located in various places such as root tips, stem 

 tips, and buds. cf. Cambium. 



Meroplankton 



An organism that is in the Plankton (q. v.) during part 

 of its life cycle, cf. Holoplankton. 



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