Mulgo 



A scrub thicket consisting mostly of Acacia. 



Mull 



A layer of Humus that is granular in structure, more or 

 less friable, slightly or not at all matted, and with a gradual 

 transition to the mineral soil below, cf. M or. 



Multiparous 



Refers to an animal that produces more than one young 

 at birth, cf. Uniparous. 



Multiple Use 



The policy of using a resource in several ways such as the 

 use of forests for the production of timber, forage, water 

 supplies, and game animals, and also for recreation. 



Multivoltine 



Refers to an organism that has several generations dur- 

 ing a single season, cf. Univoltine. 



Muskeg 



A Bog in the northern part of North America charac- 

 terized by an abundance usually of Sphagnum moss and a 

 greater or lesser abundance of shrubs and low trees such as 

 black spruce. 



Mutagen 



An influence that induces Mutation (q. v.) in organisms, 

 e. g., Ionizing radiation. 



Mutant 



An organism, characteristic, or gene resulting from Mu- 

 tation. 



Mutation 



A sudden, inheritable variation in an organism resulting 

 from changes in a Gene, or in alterations of the structure 

 or number of Chromosomes. 



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