An allele that causes an altered form of hemoglobin occurs in all human populations as a result of mutation. However in populations where malaria is a threat there is a relatively higher percentage of individuals with the allele. Individuals who have one allele for this condition have an increased resistance to malaria. Individuals with two alleles for this condition have significant medical problems and die young. This allele has been found in high numbers in certain populations in West Africa, Southeast Asia and Greece. 1) What process of evolution likely led to the appearance of this allele

feral cats are estimated to eat tens of millions of native animals each night in australia

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

bacterium is not correct