The electron transport chain is part of which of the following processes?
a.

photosynthesis and cellular respiration

b.

cellular respiration and glycolysis

c.

krebs cycle and fermentation

d.

all of the above are correct.

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.

This is a type pf behavior that animals are born with and them to survive

What statements describe a host organism?