Q: What do muscles need to contract? Choices: - stress - tendons - pressures - stimulus A:
stimulus
------
Q: What is the sum of all biochemical reactions in cells called? Choices: - respiration - diffusion - evolution - metabolism A:
metabolism
------
Q: When the maximum amount of solute has been dissolved in a given amount of solvent, we say that the solution is what? Choices: - blended - used - empty - saturated A:
saturated
------
Q: Gene duplications that are able to persist over many generations without causing too much harm to an organism or species can lead to what? Choices: - characteristics - parasites - permutations - mutations A:
mutations
------