Why does a decreased rate of photosynthesis lead to a decrease in a plant population?

What two fields of study provide the core information that is used to classify organisms?

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?