Compare and contrast the roles of photosynthesis and respiration in providing energy to a plant.

2 ways alike: both photosynthesis and respiration occur in organelles of plant cells. both involve the flow of electrons through the cell membrane in order to harvest energy.

2 ways they are different: Respiration produces energy, where as Photosynthesis requires energy Photosynthesis takes place in chloroplasts, respiration takes place in mitochondria.

1.989×10^30 kg is the weight of the sun.

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy