Alist of two choices that follows in a sequence for identification is a:
a: dichotomous key
b: classification schema.

Classification schema.

Explanation:

A classification of scheme is the product of arranging things into the group of classes. Classification scheme is related to the Carolus Linnaeus, who is the father of taxonomy and gives the system of classification. Arrange in the increasing order : Species, genus, family, order, class, phylum, kingdom.

The benefits of the classification scheme are : Classification facilitates the identification of the organisms, helps to study the evolutionary  relationships of the organisms, and helps to maintaining the relationships among the group of organisms.      

An identification key is also known as taxonomic key, which is useful to identifying unknown person.

the correct answer is:

a population changes in response to a change in the environment.

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).