Explain how organisms in lakes are related through the flow of energy. read more > >

Lake is a type of natural ecosystem as it possesses both biotic ( living components such as plants, algae, micro-organism, and animals) and abiotic (nonliving components such as water, light, temperature, oxygen content, pH of water) factors.

The different living organisms are related through the flow of energy ( in the form of organic matter) in the food chain ( a linear network between organisms, representing energy transfer in the form of organic matter) that takes place within this ecosystem.  

For example-  

Phytoplanktons ( microscopic plants) and algae-  they are autotrophic organisms that form the base of the food chain as they synthesize their own food through photosynthesis. They occupy the first trophic level and called producers.

Producers are eaten by primary consumers such as zooplankton, small fishes, ducks ( which all are herbivores).

Primary consumers are eaten by secondary consumers such as large fishes.

In this manner flow of energy occurs between different organisms in the lake.

it would be c. xylem.

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."