Which of the following following gases is used up during photosynthesis? a) carbon dioxideb)nitrogenc)oxygen d) sulfur dioxide

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

Which of the following is the scientific term for an organism that makes its food from inorganic materials? a.autotroph b.heterotroph c.embryotroph

Examine the following diagram. place the labeled layers in order from youngest to oldest.