In which of the following forms is carbon present in the atmosphere?
carbon dioxide
glucose
oil
water vapor

How are cellular respiration and photosynthesis different? cellular respiration assists breathing; photosynthesis aids pigmentation. cellular respiration breaks down glucose; photosynthesis creates glucose. cellular respiration creates glucose; photosynthesis breaks down glucose. cellular respiration releases oxygen; photosynthesis releases carbon dioxide.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen