Which of the following is the best example of long-term environmental monitoring?

a. measuring soil carbon content in a 200-year-old forest in 10 locations
b. testing stream water nitrate concentrations weekly throughout a summer
c. collecting ocean surface water temperatures monthly for four decades
d. analyzing contaminant concentrations from every well in a county

Option C is correct

Explanation:

Long term environmental monitoring is done with the objective to observe  rapid and continuous changes occurring in any component of nature such as air, water, land etc. in order to make informed planning decisions.

This also helps us to set long term environmental management and rehabilitation   goals.

Thus, option C is correct as ocean surface water is being monitored regularly with objective of managing it properly for four decades.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!