What is a group of organisms that look alike and can reproduce among their selfs ?

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

There are main groups in the modern periodic table of elements

May someone me with these science questions