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: The best thermal conductors are also the best conductors of what, which is also related to the density of free electrons in them? Choices: - light - pollution - sound - electricity A:
electricity

Q: What is venus covered in a thick layer of? Choices: - storms - fog - gases - clouds A:
clouds

Q: What does the triploid cell develop into during fertilization? Choices: - membrane - tubers - zygote - endosperm A:
endosperm