Caffeine is a central nervous system stimulant, and caffeine is a stimulant, and a stimulant constricts blood vessels. Given these facts, what does caffeine do to blood vessels among the following options: - It expands - looseness - hydrate their cells - Constrict them - sweating - Dehydration - They may not survive. - Damages them
Constrict them

Wiring requires an electrical conductor, and metals, such as copper wire, are good conductors for carrying electric current. Given these facts, what can be used in wiring as a conductor among the following options: - paper - energy - tube - copper - a prism - photons - leather - light
copper

Q: Crumple means change shape from smooth into compacted by physical force, and density increases with depth due to compaction and progressive cementation. Given these facts, crumple means_ increases by physical force. among the following options: - threatened - mass - an object - density - movement - weight - volume - It expands
A: density

Question: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants, and cars can run on pure ethanol or a mixture of petrol and ethanol. Given these facts, what can run on alcoholic fermentation of the glucose in corn or other plants among the following options: - Energy - bicycles - drink - skateboards - cars - cows - rollerskates - sugar
Answer: cars

*Question*
Viruses are so small that they can be seen only with an electron microscope, and once the camera is tuned with the microscope, the focusing depends on the microscope lens. Given these facts, viruses are so small that they can be seen by what among the following options: - focusing a lens - A computer - looking close - rays or beams - sunlight - bending light rays - seeing smaller - tuning eyes
**Answer**
focusing a lens

Q: DNA is found in chromosomes, and genes live on chromosomes, chromosomes live in cells. Given these facts, where does DNA reside among the following options: - membrane - cells - embryos - atom - complex - nucleotide - ligt - retina
A: cells