Lightning, forest fires and peat fires can start coal fires. But they are often caused by mining accidents and bad mining practises. In Indonesia, the same fires used to clear large tracts of rainforest ignited over 300 coal fires since the 1980s.
OVERACHIEVER Dictionary entry overview: What does overachiever mean? â¢ OVERACHIEVER (noun) The noun OVERACHIEVER has 1 sense: 1. a student who attains higher standards than the IQ indicated Familiarity information: OVERACHIEVER used as a noun is very rare.
In more general terms, overdominance is a condition in genetics where the phenotype of the heterozygote lies outside of the phenotypical range of both homozygote parents, and heterozygous individuals have a higher fitness than homozygous individuals. common example is the case where the heterozygote conveys both advantages and disadvantages, while both homozygotes convey a disadvantage. A well-established case of heterozygote advantage is that of the gene involved in sickle cell anaemia.