Q: Animals that molt their exoskeletons belong to which clade? Choices: - protists - spirogyra - trichina - ecdysozoa A:
ecdysozoa

Q: What has the smallest, lightest atoms of all the elements and is colorless, odorless, tasteless and nontoxic, but highly flammable in its pure state? Choices: - helium - magnesium - barium - hydrogen A:
hydrogen

Q: Particulates cause lung diseases. they can also increase the risk of heart disease and the number of what? Choices: - coughing - cancer - shortness of breath - asthma attacks A:
asthma attacks