What is a major difference between prokaryotes and eukaryotes?
a. prokaryotes have no nucleus.
b. all prokaryotes cause disease.
c. eukaryotes contain more mitochondria.
d. nucleic acids are founds only in eukaryotes.

The correct answer is A) Prokaryotes have no nucleus.

Prokaryotes are the single celled organisms, which do not possess a well defined membrane bound nucleus and other organelles. The genetic material is all these organisms is present in the cytoplasm of the cell.

Example- Bacteria.

Whereas, eukaryotes are single or multicellular organisms, which possess a well defined nucleus ( with genetic material in it) as well as other organelles like mitochondria, golgi complex, endoplasmic reticulum.

Example- Plant cell.

Thus, option A) is the right answer.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.