Question

which of the following best describes why dichotomous keys are helpful to scientists?

a. they help scientists determine what species eat.

b. they help scientists determine where species live.

c. they help scientists determine how related species are.

d. they help scientists determine the function of body structures.

Explanation:

Dichotomous keys are tools used in biology (a subfield of Natural Science) to identify organisms. They present a series of paired statements (dichotomies) that help narrow down the identity of a species. Option A is correct because dichotomous keys help scientists determine what species an organism is by eliminating other possibilities through the paired choices. Option B is incorrect as they don't relate to the location of species. Option C is incorrect because determining relatedness is more about phylogenetic analysis or taxonomic classification beyond just dichotomous keys. Option D is incorrect as dichotomous keys focus on identification, not the function of body structures.

Answer:

A. They help scientists determine what species an organism is.