Q: Atoms of different elements can combine in simple whole number ratios to form what? Choices: - mixtures - carbon compounds - combinations - chemical compounds A:
chemical compounds

Q: What is the transparent outer covering of the eye? Choices: - pupil - iris - retina - cornea A:
cornea

Q: Q: The anion is the methanoate ion, which is commonly called the what? Choices: - isomer - metabolized ion - glutathione ion - formate ion A:
A: formate ion

Question: Q: The accumulation of what cells begin the development of the vertebral column and thoracic cage? Choices: - semiosis cells - hindbrain cells - False cells - mesenchyme cells A:
Answer: mesenchyme cells

*Question*
Q: Because action potentials are so brief, a neuron can produce hundreds per what? Choices: - day - minute - lifetime - second A:
**Answer**
second

(Question)
Q: What is caused by atoms or ions when they share or transfer valance electrons? Choices: - loss of charge - gain of charge - force of repulsion - force of attraction A:
(Answer)
force of attraction