Which of the following hypotheses can be successfully tested? a. Snails were the first organisms on Earth to produce energy (ATP) through cellular respiration.
b. Plants were the first organisms on Earth to produce food (carbohydrates) through photosynthesis.
c. Cellular respiration and photosynthesis cannot occur in a closed biological system without each other.
d. Carbon dioxide is consumed by Elodea plants and produced by snails.
e. Elodea plants will increase the carbon dioxide concentration released by snails.

What is the relation ship between structure and function in an organism

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

This map shows how climate change might affect precipitation patterns in the great plains of the united states by the end of this century. brown shoes a decrease in percipitation, and blue shows an increase. the maps differ based on the predictive levels of green house emissions. the maps shows that northern area should get a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.southern areas show a. more pracipations regardless of emmissions b. less pracipation, regardless of emmissions levels c. more precipitation, but only when emission levels.to use these maps to prepare for natural disasters in the great plains, scientist need to ask? a. how many tons of emissions were used at the basis of the map.b. which types of fossil fuels are used in the great plains c. if you think the above is wrong it's probly c the question is cut off