Features of genetic material in prokaryotes are: BuGepure onun oreer: a. number of chromosomes is peculiar to species b. single circular chromosome c. single linear chromosome d. all the chromosomes carry secondary constrictions

The correct answer is b. single circular chromosome.<br /><br />In prokaryotes, the genetic material is typically found in a single circular chromosome. This chromosome is not enclosed within a nucleus, as prokaryotes lack a defined nucleus. The circular chromosome contains all the genetic information necessary for the cell's growth, reproduction, and other essential functions.<br /><br />Option a, "number of chromosomes is peculiar to species," is not a specific feature of genetic material in prokaryotes. The number of chromosomes can vary among different species, but this is not a defining characteristic of prokaryotic genetic material.<br /><br />Option c, "single linear chromosome," is incorrect because prokaryotes do not have linear chromosomes. Linear chromosomes are typically found in eukaryotic cells.<br /><br />Option d, "all the chromosomes carry secondary constrictions," is also incorrect. Secondary constrictions are regions on chromosomes where the DNA is more tightly coiled, and they are typically found in eukaryotic chromosomes, not in prokaryotic chromosomes.<br /><br />Therefore, the correct answer is b. single circular chromosome.