20 points!!! 1. The reactants for the chemical reaction known as photosynthesis enter the

chloroplast. What are these reactants?

2. After photosynthesis is complete, its products can leave the chloroplast. What are

these products?

3. Write the balanced chemical equation for photosynthesis.

4. What is the energy source that allows photosynthesis to occur?

5. What questions do you have?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Ineed to know why d is the correct answer asap

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?