Which of the following statements is true?

a.

the nitrogen cycle is the most important cycle for life.

b.

the oxygen cycle is the least important cycle for life.

c.

life can be sustained without any of the cycles for life present.

d.

all cycles of matter are equally important for life to be sustained

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources? (site 1)

Plants are used for so many things. in your house alone, you can probably look around you and see where plants have been used. for this project, you will identify various uses of plants in your home. directions make a list of objects, products, and any other items around your house where plants were involved in the production of the item. you should have a list of at least twenty items. then respond to the following questions: note: your list of objects and the answers following should be at least 200 words in length. what if plants no longer existed on earth? how would your life be different?

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.