Necrotic death of brain tissue usually produces necrosis. a. caseous b. coagulative c. liquefactive d. fat

c. liquefactive

Explanation:

Liquefactive necrosis is produced when the tissues of the brain tissue dies. The brain tissue contains a lot of enzymes and little connective tissue. Coagulative  necrosis  is accidental in nature and occurs from ischemic injury in any tissue.

Caseous necrosis is associated to the damage of the lungs, for example damage of the lung tissue by tuberculosis.

Fat necrosis occurs as a result of the injury in the adipose tissue or fat cells.  

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."