Fill in the blank with the correct word or phrase.

Darwin proposed a new theory of how evolution works, which he called

whats in the blank

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

What is the difference between a scientific hypotheses and a scientific theory?