Ques:Q: What are the pyramid-shaped, paired organs that are connected to the trachea by the right and left bronchi? Choices: - kidneys - stomachs - ovaries - lungs A:

Ans:lungs
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Ques:Q: Compounds that form from two or more nonmetallic elements are called what? Choices: - ionic bonds - valent bonds - hydrogen bonds - covalent bonds A:

Ans:covalent bonds
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Ques:Q: What is the study of matter and energy referred to as? Choices: - biology - geology - cosmology - physical science A:

Ans:physical science
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Ques:Q: When amino acids bind together, they form a long chain called what, which is an essential component of protein? Choices: - peptide - lipids - enzyme - polypeptide A:

Ans:
polypeptide
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