Which part of an amino acid is the only one that varies and is what defines its properties?

Arafura file snakes are large, aquatic, non-venomous snakes found in the flood-plains of australian rivers. they feed only on fish found in the rivers. it has been observed that heavy rainfall in the wet season in one year leads to prolonged inundation of the floodplains lasting a year or longer. it has also been observed that these snakes remain in good physical condition after a flood. explain how the file snake population in a region is likely to be affected by the prolonged inundation of a flood-plain.

Agene in a type of bacteria when the ses bacteria reproduce asexually this mutation can only be inherited by

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result