You are presented with the question "Behaviors that improve fitness improve through what" and the following answer choices: - Riding a bike - environment - reduced heat - sleep - competition - evolution - Summer - Energy Now knowing that behaviors that improve fitness increase through natural selection and natural selection is the mechanism of evolution, choose the best answer.
evolution
You are presented with the question "Which product is widely used today to make fuel for cars?" and the following answer choices: - swamp gas - corn - comets - meteorites - fat - energy - oil - Carbon Now knowing that ethanol is produced by alcoholic fermentation of the glucose in corn or other plants and methanol and Ethanol are two types of alcohol fuels used in cars, choose the best answer.
corn
Q: You are presented with the question "what will expand when heated?" and the following answer choices: - arteries - water vapor - breathing - viewing - condensation - a prism - glass - chlorine Now knowing that if gas is heated then that gas will expand and chlorine is a type of Green Cross gas, choose the best answer.
A: chlorine
Question: You are presented with the question "What can be used for keeping warm?" and the following answer choices: - keratin - vacuum - four limbs - energy - cold - engines - magic - heat Now knowing that thick fur can be used for keeping warm and carpet beetle larvae feed on the keratin and chitin commonly found in wool, fur, or feathers, choose the best answer.
Answer: keratin
*Question*
You are presented with the question "Cells cannot survive without plants breathing into what?" and the following answer choices: - carbon dioxide - seas - Sulfur dioxide - lungs - water vapor - atmosphere - water - water tanks Now knowing that cells cannot survive without oxygen and plants breathe oxygen into the atmosphere, choose the best answer.
**Answer**
atmosphere
You are presented with the question "What do muscle contractions give the ability to happen?" and the following answer choices: - heat energy - movement - metriculation - Energy - fallopian tubes - ejaculation - kinetic energy - sperm Now knowing that ejaculation occurs when muscle contractions propel sperm from the epididymes and sperm motility is the ability of the sperm to move, choose the best answer.
ejaculation