In the chemical equation for photosynthesis, carbon dioxide and water are converted to glucose and oxygen 6CO2 + 6H20 - CH1206 + 602
Which component could be added to complete this chemical equation?

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?