The concentration of co2 in the atmosphere globally (choose any/all that apply, points deducted for incorrect answers):
a. has a greater annual variation in the northern hemisphere than in the southern hemisphere
b. has a greater annual variation in the southern hemisphere than in the northern hemisphere
c. has an annual variation globally that is constant regardless of location
d. varies annually depending on rates of marine nep
e. varies annually depending on rates of terrestrial nep

a. has a greater annual variation in the northern hemisphere than in the southern hemisphere

Explanation:

These latitudinal fluctuation variations are the consequence of plant photosynthetic activity. As plants begin to photosynthesize in the spring and summer, they consume CO2 from the atmosphere and eventually use it as a carbon source for growth and reproduction. This leads to the decline in CO2 concentrations beginning in May each year. By reducing photosynthesis, crops save energy once winter comes. The dominant method, without photosynthesis, is ecosystem CO2 exhalation (cellular respiration and decomposition), including bacteria, crops, and livestock.

Two latitudes of Earth contain most of land plants: Northern Hemisphere mainlands and the tropics that envelop, among different territories, the immense downpour woods of the Amazon basin. Close to the equator temperature are constant all year long. Shifts in CO2 are hence most articulated in the Northern Hemisphere, where the regular changes in temperature bring about enormous contrasts in plant photosynthesis from summer to winter.

protist eukaryotes that are not plants, animals, or fungi ("misfits")

b. lithosphere, asthenosphere, mesosphere   is the answer most likely