Answer the following question given this paragraph: human body system of glands that release hormones into the blood. Q: Glands release what substance into the blood? Choices: - enzymes - toxins - acids - hormones A:
hormones
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Answer the following question given this paragraph: Q: The chemical used by the ants to weed their garden turns out to be what kind? Choices: - sulfide acid - nitric acid - sealant acid - formic acid A:
formic acid
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Answer the following question given this paragraph: Amines are molecules that contain carbon-nitrogen bonds. The nitrogen atom in an amine has a lone pair of electrons and three bonds to other atoms, either carbon or hydrogen. Various nomenclatures are used to derive names for amines, but all involve the class-identifying suffix ine as illustrated here for a few simple examples:. Q: What term is used to describe molecules that contain carbon-nitrogen bonds? Choices: - compounds - ions - nitrites - amines A:
amines
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Answer the following question given this paragraph: Space may seem empty, but actually it contains thinly spread gas and dust, called interstellar medium, that gradually collapses over immense stretches of time and collects into denser clouds of gas and dust. The atoms of gas are mostly hydrogen and are typically about a centimeter apart. The dust is mostly carbon and silicon. In some places, this interstellar medium is collected into particularly dense clouds of gas and dust known as a nebula . A nebula is the birthplace of stars. Our sun was probably born in a nebula around 5 billion years ago. Q: What does interstellar medium consist of? Choices: - gravitational waves - the strong force - dark matter - thinly spread gas and dust A:
thinly spread gas and dust
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