Question

while researching a topic, a student has taken the following notes: chromosomes are cellular structures that contain genes. having more chromosomes doesnt make a species more complex. canis familiaris (domestic dog) is a complex, multicelled mammal that has seventy - eight chromosomes. sterkiella histriomuscorum is a simple, single - celled protozoan that has over 15,000 chromosomes. the student wants to provide an explanation and an example of the relationship between chromosome number and species complexity. which choice most effectively uses relevant information from the notes to accomplish these goals? a having more chromosomes doesnt make a species more complex; in fact, the simple, single - celled sterkiella histriomuscorum has over 15,000 chromosomes, while the complex, multicelled canis familiaris (domestic dog) has seventy - eight chromosomes. b canis familiaris (domestic dog) is a complex, multicelled mammal, while sterkiella histriomuscorum is a simple, single - celled protozoan. c sterkiella histriomuscorum, a simple, single - celled protozoan, has over 15,000 chromosomes, which is far more than the seventy - eight chromosomes the complex, multicelled canis familiaris (domestic dog) has. d the domestic dog (canis familiaris) has seventy - eight chromosomes, while the protozoan sterkiella histriomuscorum has over 15,000.

Explanation:

The student needs to explain and give an example of the relationship between chromosome number and species complexity. Option A clearly states the relationship "Having more chromosomes doesn't make a species more complex" and provides the appropriate example of the simple single - celled Sterkiella histriomuscorum with a large number of chromosomes and the complex multicelled Canis familiaris with fewer chromosomes. Options B, C, and D just state the facts about the organisms and their chromosome numbers without explicitly stating the relationship.

Answer:

A. Having more chromosomes doesn't make a species more complex; in fact, the simple, single - celled Sterkiella histriomuscorum has over 15,000 chromosomes, while the complex, multicelled Canis familiaris (domestic dog) has seventy - eight chromosomes.