Ques: Q: What's the name for an atom that has gained or lost an electron? Choices: - an photon - isotope - neutrino - an ion A:
Ans: an ion

Ques: Q: What do you call the gently sloped ocean floor nearest the edges of continents? Choices: - continental divide - continental stratosphere - continental solution - continental shelf A:
Ans: continental shelf

Ques: Q: What are the proteins called that speed up biochemical reactions in cells? Choices: - peptides - hormones - carbohydrates - enzymes A:
Ans: enzymes

Ques: Q: Cephalochordates have a notochord and nerve cord but not a? Choices: - digestive system - nervous system - brain - backbone A:
Ans:
backbone