Q: What is the product of microfilament movement powered by chemical energy? Choices: - blood circulation - nerve stimulation - muscle fusion - muscle contraction A:
muscle contraction

Q: What are chemical bonds between atoms of nonmetals that share valence electrons called? Choices: - electron bonds - ionic bonds - gravitational bonds - covalent bonds A:
covalent bonds

Q: Q: What might eventually happen to a species if it is unable to reproduce? Choices: - natural selection - migration - adaptation - extinction A:
A: extinction

Question: Q: The two smallest carboxylic acids are formic acid and what else? Choices: - carbonates acid - ethylene acid - ascorbic acid - acetic acid A:
Answer: acetic acid

*Question*
Q: What scientific word, which gives its name to a type of rock, means "to change form"? Choices: - evaporation - evolution - igneous - metamorphism A:
**Answer**
metamorphism

Q: Q: What is the wavelength of light expressed in? Choices: - nanoseconds - millimeters - vatts - nanometers (nm) A:
A: nanometers (nm)