1q. -> look here.

You could consider actually finding the answer by yourself. It’s not very complicated…. Is it?

Do you know what photosynthesis do? what part can be related to atmospheric gases? If not read again ALL the link given by Trev (yeah, scroll up….). And you should also know what is needed for ceel respiratio, shouldn’t you?

And if you can’t connect the dot, you really have a big problem, and it wouldn’t be a service to give you the answer (but a brain sure would…).

try to look in dictionariesand in encyclopedias

You all are pretty harsh at times

yeah, don’t let them get to you. people on this forum have grown tired of other people asking for answers, and since these questions are quite easy, i too doubt you would be unable to find the answers if you knew the processes of potosynthesis and cellular respiration. If i’m wrong, then please keep looking and you will find your answers

Yeah I can understand your point of view, I am rather new on this site as my name entails, I suppose it will take awhile for me to learn how to weed out those who want thier homework done from those and those who are asking questions for the sake of thier own interest. I’m a bleeding heart tho, I am willing to help out with the dumb questions as long as they are genuine 🙂

Our position is usually:

– people who ask a question and show that they have thought about it, either by giving a tentative answers, or because they explain what they do not understand get astraight answer.

– Post that are obviously homework questions (easy to post, most of the time the posters just post the question) get some hints on where to start looking… at best.

FenderXGirl, those questions can be answered by making a cup of coffee, siting down, getting out a notebook -clicking the tutorials at the top of the screen and reading while jotting down notes. =D

I have these exact same questions, and I’m having trouble answering them as well. For question 1, I answered "By increasing irradiance," but I am not sure if that’s right…

For question 2, I think that the cycle of oxygen and carbon dioxide would slow down or halt, since the cycle is part of photosynthesis (since plants inhale carbon dioxide and exhale oxygen).

For question 3, I think animal life would definitely cease to exist without autotrophs because, obviously, they would have no source of food.

What do you guys think of these answers?? Am I on the right track?

Fromage, you are probably right. As for the second question, there would also be less oxygen and more carbon dioxide.