What technological advancement was necessary before scientists could begin to observe cells? a. invention of the microscope b. invention of the balance c. invention of the telescope d. invention of the thermometer

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

Any sound above what db can cause hearing loss in human beings

9. the history of life on earth is recorded in