Astonefly is an aquatic insect that has an incomplete life cycle. it spends its growing period (nymph life stage) on the bottom of streams, camouflaged by the rocky bottom. when it has finished growing, it crawls to the edges of streambeds to molt and emerges as a winged adult. fish often eat the juvenile nymphs as they make their way to the edge of the streambeds. suppose that scientists who study predator-prey relationships notice that over a 50-year span, new color patterns evolve in the stonefly nymphs. what would be a logical and reasonable question that the scientists could investigate in relation to their observations and their knowledge of predator-prey relationships

As the color pattern changes in nymphs developed, was there also a change in the color of the streambeds on which the nymphs molted?

Explanation:

Camouflage is an adaptive measure by animals to escape preys. If the nymphs are hunted easily by fishes, it means that their colour is obviously different from the colour streambeds thus they are easily spotting by the fishes.

An adaptation measure in this situation will be to change their colour to the prevailing colours to the colours of the streambed.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."