Scientists recently found a way to make inexpensive hydrogen that can be used as a fuel. This process of hydrogen production has some similarities with photosynthesis. In plants, photosynthesis uses energy from the Sun to chemically combine water and carbon dioxide into sugar and oxygen gas. The sugar is then used as a fuel source for the plant and organisms that consume the plant. To produce hydrogen, scientists mixed extremely small particles of cadmium and selenium, which emit electrons when exposed to light, and ascorbic acid, a chemical that produces hydrogen ions when it decomposes. The scientists used a nickel catalyst, which causes the emitted electrons to combine with the hydrogen ions and form hydrogen gas. This reaction is continuous, and after two weeks, the hydrogen gas was still being produced. The scientists hope this will be a viable fuel source in the future. Which comparison of this new process of hydrogen production and photosynthesis is supported by the information provided? a. The new process is more efficient than photosynthesis.

b. The new process emits more electrons than photosynthesis

c. Both processes change light energy to chemical energy

d. Both processes result in the production of hydrogen gas.

This organism is not capable of performing photosynthesis. (horseshoe crab) true false

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.

Which of the following is a true statement? a. individuals evolve to have adaptations. b. individuals have adaptations that can change over time. c. individuals have traits that may or may not make them successful at reproduction. d. populations cant evolve, only individual organisms.