Fact 1: All chemical reactions require activation energy to get started. Fact 2: Fire is a chemical reaction. Given the two facts above, answer the question "What does fire require to get started?" with the following options: - an engine - activation energy - water - energy usage - direct energy - dogs - activated almonds - adding heat
activation energy

Fact 1: TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH. Fact 2: Thyroid hormones regulate the metabolic rate in the body. Given the two facts above, answer the question "What gland helps regulate the metabolic rate in the body?" with the following options: - dehydration - Veins and arteries. - Prostate glands - H2O glands - Pituitary gland - pancreas - sweating - Anal scent glands
Pituitary gland

Fact 1: Amphibians have permeable skin that easily absorbs substances from the environment. Fact 2: All frogs are amphibians. Given the two facts above, answer the question "what has permeable skin that easily absorbs substances from the environment?" with the following options: - ferns - a fish - humans - animals - scales - bats - skin cells - frogs
frogs

Fact 1: Immunodeficiency occurs when the immune system is not working properly. Fact 2: Work items are broken down by year of effort. Given the two facts above, answer the question "Immunodeficiency occurs when the immune system is what?" with the following options: - dangerous - homogenous - healthy - broken down - reduce - perfect - It decreases - functioning
broken down