Explain what cellular respiration is using the vocabulary words: cellular respiration, energy, matter, and chemical reaction. Make sure to describe how the cell gets the matter and energy needed.

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

What did nikola tesla invent that influence our way of living?