At which of the following points during the carbon cycle is energy transformed from chemical to mechanical energy?
a- when stored energy is released as heat.
b- when atp molecules are used to fuel movement
c- when carbon dioxide is converted to glucose
d- when fossil fuels are burned releasing carbon dioxide

Afor ram b for pats super bowl pick one

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

When analyzing tree rings, what do scientists assume a thin ring indicates?