Question

Bacteria are very small single-celled organisms that lack a nucleus. Although bacterial cells are less complex than the cells that make up the human body, bacteria are very important to human health. Which statement BEST summarizes how bacteria affect human health?
A) Bacteria cause disease in humans.
B) Bacteria are beneficial to humans.
C) Bacteria rarely affect human cells because they are so much smaller.
D) Some bacteria are beneficial to humans and some bacteria are harmful.

Answer 1

hey..

option d will be the right answer..

cause' bacteria is both helpful and harmful!

thanku

Answer 2

hey mate,

option D) Some bacteria are beneficial to humans and some bacteria are harmful.....
summarises best about bacteria....
because bacteria are beneficial (non pathogenic) as well as harmful (pathogenic)....

thanks....
nice to help you