If there are 3 different alleles for a particular gene in a population of diploid organisms, how many different genotypes are possible in the population

Let’s call them allele A, allele B and allele C. A diploid organism always has 2 alleles, which can be equal or different. So you can figure out these posible combinations: AA, AB, AC, BB, BC, CC (please note that AB = BA, so that counts as 1 genotype; the same with AC = CA, BC = CB). So there are 6 different posible genotypes. Besides, this doesn’t mean there are 6 phenotypes – you will have to gather information about dominance to see which phenotype is produced by each genotype (there are usually less phenotypes than genotypes).

the answer is c. altitude. hope this ! #brainiac

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.