Why does a living thing need to be responsive? Why do humans need only oxygen to survive? Why is water important to living things? Why is carbon so important to living organisms? Why would the sun need to exist first? Why is reproduction essential for organisms?
Why do all organisms require nitrogen? Why does phytoplankton need nitrogen? Why is nitrogen necessary for life? Why are bacteria needed in the nitrogen cycle? Why do living organisms need nutrients? Why are bacteria a necessary part of the nitrogen cycle?
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。 What do you the trees and a bird have in common? 71 All living things must have water to survive whether they get it from a water fountain a rain cloud or a little bottle attached to the side of a bird...
Watch complete video answer for “Why do body cells require oxygen?” of Biology Class 7th. Get FREE solutions to all questions from chapter RESPIRATION IN ORGANISMS.
Plants are the producers in the Earth's ecosystem. They produce the oxygen necessary for the survival of living organisms. In order for plants to survive, they need five things to grow: air, water, sunlight, soil and warmth. For photosynthesis, plants re
Protect Our Environment As we all know, the environment around us is getting worse and worse. In some places we cant see fish swimming in the river or trees on the hills. There is less and less fresh water in the world. Some people even have no clean water to drink. So I think we...
However, there're many other interactions within ecosystems that are not so apparent and require closer examination. And the example from your reading was the forest ecosystem along the Pacific coast of North America…um…specifically the role of salmon. ...
content as we do to those with more ordinary tastes or to those with different kinds of expensive tastes, namely those for whom the fulfillment of ordinary preferences costs more (this latter group may include some individuals whose disabilities mean they require equipment for everyday living). ...
beautiful natural environment is missing, Bridges oxygen to feed the fish in the river without artificial is about to turn over the pool. Now more dust storms, epidemic, fatigue life of people ended almost disappeared, all kinds of cancer eating away at the us one after another of the earths...
Figure 15: Fish require sufficient levels of dissolved oxygen to survive. Many species cannot survive if concentrations drop below 4 mg/L. The level of DO required varies by species. In general, most fish species will grow and thrive within a range of 5-12 mg/L. However, if levels drop...