Hundreds of millions of years ago--before organisms were buried to become fossil fuels--plants, algae, and plankton originally got their energy from where?

Calories from organisms they ate
Chemicals from inside the earth
Radiation from the sun
Absorption from the soil

Is citizens were comfortable with their detachment from england and had no interest in going to war

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Which beat describes the brain stem