How might biotic and abiotic factors have affected the tortoises that Darwin observed on the Islands

Some Abiotic factors are water, soil, light, temperature. These are non-living things that the tortoises will interact with in the enviornment. These can affect them for example if there is an abundance of water and light then the tortoise population can expand. However if there is too little or too much of these factors then the population will decrease. Biotic factors are plants, animals, bacteria and Protists. These are the living things the tortoises will interact with in the enviornment. Biotic factors can affect them for example if there are too many preditor animals for the tortoises, then their population will be very low and a lot of them will die.

Explanation:

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: