Mutation creates new genetic variation in a gene pool, and genetic variation is the basis for natural selection. Given these facts, what is a basis for natural selection among the following options: - fur and fat - competition - mutation - root growth - insects - animals - trees - cows
mutation

Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants, and ethanol is a grain alcohol. Given these facts, what is produced by the fermentation in corn and other plants among the following options: - carbon dioxide - white vinegar - gasoline - grain alcohol - glucose - vinegar - Organic compounds - chlorofluorocarbons
grain alcohol

Q: HIV infects and destroys helper T cells, and scientists agree that HIV causes Aids. Given these facts, what infects and destroys helper T cells among the following options: - swea - Wasps - AIDS - CO 2 - PDAs - humans - heat - anemia
A: AIDS

Question: Wind is used for producing electricity, and wind powered energy is provided by the wind, collected by using a wind turbine. Given these facts, wind turbines can produce what among the following options: - hydroelectricity - dangerous - electricity - heat energy - toxic waste - sunlight - Destroy bridges - massive damage
Answer: electricity

*Question*
Information in an organism 's chromosomes cause genetic traits to be passed down to that organism 's offspring, and chromosomes are units of genetic information. Given these facts, how are genetic traits passed down to offspring among the following options: - Through mucus - Through chromosomes - Through bacteria - Plant reproduction - Through the environment - Through play - Males and females - deoxyribonucleic acid
**Answer**
Through chromosomes

*Question*
Uneven heating of the Earth 's surface cause wind, and extremely high winds can cause extensive damage. Given these facts, uneven heating on the Earth's surface can cause what among the following options: - extensive damage - Plant growth is reduced - harmful substances - Dehydration - rain or sun shine - Physical weathering - global warming - Greenhouse gases
**Answer**
extensive damage