Yes, this is true!
You should genereally use sources for anything you say if it's not your original idea - this way you can avoid being accused of plagiarism.
One exception is common knowledge - so you don't have to provide sources for example for what a capital of a certain country is.
Answer:
850 CE: the abbasid dynasty ruled as caliphs from their capital in baghdad in modern iraq after taking over authority of the muslim empire from the umayyads in 750 CE
good luck
Answer:
Civil rights are an essential component of democracy. They're guarantees of equal social opportunities and protection under the law, regardless of race, religion, or other characteristics. Examples are the rights to vote, to a fair trial, to government services, and to a public education.
Answer:
b. Individuals colonize another planet and become isolated from earth.
Explanation:
Natural selection is a theory by Charles Darwin which states that organisms best adapted to an environment are more likely to survive and pass that adaptation to their offspring. When individuals colonize a new planet and are isolated from Earth, those that best adapt to the new planet will likely survive and pass the adaptation to their offspring according to natural selection theory.
