The ecosystem requires a constant input of energy because energy cannot be stored. The enrgy always gets converted for supporting life in the ecosystem. Some amount of energy is also lost during this conversion. So if there is not a constant supply of energy, then the ecosystem will ultimately breakdown. In case of humans, the energy is received by consuming food. The energy of the food geets converted to the enrgy that helps a human being to complete his daily chores. So energy is being lost at every step. To regain this energy the humans have to eat food regularly. This way the humans need a constant supply of energy to survive. It is the same in the case of all living things in the ecosystem.
The image on the left is sleet.
Answer:
7. B. the variety of species on Earth
8. D. invasive (exotic)
Explanation:
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Answer is: isotonic because water surrounds the cell
Answer:
Option B, yellow stars
Explanation:
The different range of temperature and the color associated with the stars are as follows - Star with temperature between 5 to 6 thousand kelvin are yellow in color . A star of blue color has a temperature between 30 to 40 thousand kelvin, while a star that has a temperature between 10 to 30 thousand kelvin appears blue white in color. A star appears white when it has a temperature between 7 to 10 Kelvin . A star has red color when its temperature is less than 3.5 thousand kelvin.
Hence, option B is correct.