Photosynthesis topically occurs in plant cells. cellular respiration occurs

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.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond