Oxidation and reduction reactions are typically linked within a cell

Explanation:

Oxidation and reduction reactions are typically linked within a cell. They are part of most matter and energy transformations necessary for vital life function. exergonic reaction drives an endergonic reaction. adds a phosphate group to a molecule

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.