6. Which of the following is FALSE about the efficiency of machines? a. Machines can be more efficient by reducing friction.
b. Adding oil helps machines slide across each other more easily.
c. Adding more opposing forces helps to reduce friction.
d. Adding grease helps machines slide across each other more easily.

a

Explanation:

because machines require friction in order to work. it wouldnt be efficient by reducing friction

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.

not sure if this is what you'r looking for eubacteria and archaebacteria