Ques:Q: What structure does methane have? Choices: - two dimensional oxyhedra - two dimensional tetrahedra - three dimensional oxyhedra - three dimensional tetrahedra A:

Ans:three dimensional tetrahedra
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Ques:Q: Certain characteristics are frequently inherited together because of what? Choices: - correlation - mitosis - genetic combination - linkage A:

Ans:linkage
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Ques:Q: Blood flows from the right atrium to the right ventricle, where it is pumped into the what? Choices: - bronchial circulation - respiratory system - kidneys - pulmonary circuit A:

Ans:pulmonary circuit
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Ques:Q: Which pollution can cause lung cancer and can also make asthma and other diseases worse? Choices: - climate pollution - water pollution - air pollination - air pollution A:

Ans:
air pollution
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