Fact 1: Agreenhouse is used to protect plants from the cold. Fact 2: Molecules expand with heat and contract with cold. Given the two facts above, answer the question "What is used to protect plants from contracting molecules?" with the following options: - greenhouses - staying warm - Enzymes - earmuffs - electricity - jackets - sweaters - exoskeleton
greenhouses

Fact 1: Secondary growth forms secondary vascular tissues and bark. Fact 2: All trees have bark. Given the two facts above, answer the question "what has secondary growth?" with the following options: - viscosity - plants - oak - density - ferns - primary - trees - leaves
trees

Fact 1: Abreathing mask is used for keeping harmful particles from entering the respiratory system. Fact 2: Oxygen enters the respiratory system through the mouth and the nose. Given the two facts above, answer the question "Breathing masks are used to keep harmful particles from entering the mouth and the what?" with the following options: - body - eyes - air - skin - gullet - nose - ears - lungs
nose

Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Populations are groups of individuals of the same species. Given the two facts above, answer the question "Harming an animal species has a what on the size of a group of individuals of that species?" with the following options: - Abnormal cell growth - uncontrolled - net growth - positive effect - massive damage - negative impact - non-negative impact - major threat to health
negative impact