Fact 1: Veins generally carry deoxygenated blood. Fact 2: Deoxygenated blood is heavy with carbon dioxide. Given the two facts above, answer the question "What is blood heavy with?" with the following options: - Carbon monoxide - Energy. - Bacteria - Chemical energy - matter vibrating - Carbon dioxide - Veins and arteries. - Water
Carbon dioxide

Fact 1: Most amphibians breathe with gills as larvae and with lungs as adults. Fact 2: All frogs are amphibians. Given the two facts above, answer the question "What can breathe with gills as larvae and with lungs as adults?" with the following options: - humans - viruses - a fish - animals - bats - frogs - bacteria - air
frogs

Q: Fact 1: Coal is used to produce electricity by burning in coal-fire power stations. Fact 2: Solid refined coal is easy to transport and can be used in coal-burning equipment. Given the two facts above, answer the question "Solid materials used to produce electricity by burning in what need to be transported firs" with the following options: - Conifers - animals - it needs them - humans - heat energy - important habitats - power stations - batteries
A: power stations

Question: Fact 1: Cell division is how organisms grow and repair themselves. Fact 2: Plants are amazingly adaptable organisms. Given the two facts above, answer the question "what uses cell division to grow and repair itself?" with the following options: - amoeba - fungi - density - animals - h2o - plants - clouds - grass
Answer: plants

*Question*
Fact 1: Constriction occurs when the muscular walls of blood vessels contract. Fact 2: Cocaine constricts the blood vessels. Given the two facts above, answer the question "Cocaine causes what to contract?" with the following options: - layers of fat - a lot of human deaths - Walls of blood vessels. - harmful substances - the rest of the body - metabolic reaction - direct damage to the lungs - decreases its bodily water
**Answer**
Walls of blood vessels.

Q: Fact 1: Threatening behavior causes a fight-or-flight response in animals. Fact 2: Fighting can lead to brawls and significant injury. Given the two facts above, answer the question "What can threatening behavior cause?" with the following options: - love - toxins - Pollution - disease - knowledge - injury - negative - friendship
A: injury