Any change in allele frequencies in a gene pool is called

microevolution

Explanation:

There are two major types of evolution: major and micro. According to microevolution, change in  allele frequencies that occurs over time is due to microevolution. There are multiple mechanisms that can cause this such as  mutation, selection, gene flow and genetic drift.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.