The mitochondria of an animal cell use sunlight to make sugar

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Could someone me with number one you

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.