If a certain band on one chromatography strip has been identified as chlorophyll a, chlorophyll a could be identified on a second
chromatography strip by looking for a band
A. with no colour
B. of darker colour
C. in reverse position
D. in a parallel position

D

Explanation:

The same chlorophyll can be identified if it moves the same distance up the second chromatography strip as it did on the given chromatography strip.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

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.