fact: fact means that something is a true statement
opinion: opinion is someones point of view about something
analogy: a comparison between two things, typically on the basis of there structure and for the purpose of explanation or clarificationl.
deduction: It can also mean to draw to a conclusion through logical reasoning.
inattentive:showing a lack of attention or care
causality:the relation between cause and effect
natural selection:Natural Selection is when the best type of species survive.
stem cells:Embryos formed during the blastocyst phase of embryological development (embryonic stem cells).