Muhammad Divided the first Islam empire
The first word is would be the genus and the second would be what tips species it is. This system is called binomial nomenclature
Sebum, a fatty substance that serves as a water repellent it also serves as a natural antibacterial and antifungal agent,
yes the skin is important not only to excrete but its also a protective organ that absorbs oxygen and nitrogen
Answer:

Cost : The expenditure incurred by a producer on the factor as well as non-factor inputs for a given amount of output of a commodity.