Which of the following statements best justifies the claim that the conditions in at least one

Students investigated the effect of light on the carbon cycle in aquatic ecosystems by performing the controlled experiment summarized below. The students placed equal amounts of water (pH 7.0) from a large aquarium in glass beakers. The students transferred aquatic plants from the aquarium to several of the beakers, and then they placed equal numbers of the beakers in the light or the dark (Figure 1: groups I and II. Similarly, the students transferred goldfish from the same aquarium to other beakers, and then they placed equal numbers of those beakers in the light or dark (Figure 1: groups III and IV. Finally, the students placed an equal number of beakers containing water only in the light or dark (Figure 1: groups V and VI

After exposing the samples to light or dark for one hour, the students recorded the pH of the water in each beaker. Carbon dioxide dissolved in water will lower the pH of an aqueous solution. In the experiment, the students used changes in pH to monitor changes in the amount of carbon dioxide in the water. For each treatment group, the students calculated the mean pH and standard error, as documented in the table below.

Which of the following graphs is the most appropriate representation of the experimental results documented in the table?

Which of the following statements best describes how organisms such as rabbits obtain the carbon necessary for building biological molecules answer choices?

Which of the following best justifies the claim that alleles that may be adaptive?

Which of the following would best be considered evidence in support of the RNA World model?

Which of the following statements best describes how molecules released by the fish become nutrients for the plants?