The fruit fly is an excellent organism for genetic studies because it has simple food requirements, occupies little space, is hardy, completes its life cycle in about 12 days at room temperature, produces large numbers of offspring, can be immobilized easily for examination, and has many types of hereditary variations. a. True
b. False

TRUE

Explanation:

The characteristics of D. melanogaster make it a good and easy species to work with. The fruit fly is excellent for genetic studies not only because of all the mentioned traits, but also because it results easy to immobilize them for examination, their four pairs of chromosomes can be easily identified in salivary glands, and many of their genetic variations can be seen using low power microscopes. Also, it results in a perfect organism that can be used in education during genetic curses either in high school or university.      

its the cell wall and the they are unique to plant