Q: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants, and plants use the sun's energy to transform carbon dioxide gas and water into a sugar called glucose. Given these facts, production of ethanol is dependent on among the following options: - the environment - the sun's energy - rubbing alcohol - Movement of an air mass - Rayleigh scattering - agriculture - heat produced - vinegar
A: the sun's energy

Q: Invertebrates are animals that lack a vertebral column, or backbone, and snails and slugs are invertebrates. Given these facts, what lack a vertebral column among the following options: - snakes - cacti - eels - insects - Conifers - ferns - fish - snails
A: snails

Q: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs, and all reptiles produce eggs with a waterproof shell full of amniotic fluid. Given these facts, reptiles are a class of tetrapod vertebrates that produce eggs with what among the following options: - empty shell - Chemical energy - waterproof shell - water-filled shell - aerobic capacity - heat energy - kinetic energy - shell lining
A: waterproof shell

Q: The looseness of soil has a positive impact on a plant 's roots' growth in that soil, and tree roots stabilize the soil and prevent soil erosion. Given these facts, what makes soil stable among the following options: - weather - heat - magma - rain - streams - water - trees - crust
A: trees