Which describes a situation in which a forest fire can be to an ecosystem?
a. they destroy diseases and harmful insects that may have been infecting an area
b. they cut down on the numbers of different animal species living in a forest
c. they burn dead inorganic matter and return the nutrients to the soil.
d. they destroy many plants growing on the forest floor allowing older plants life to continue to grow.

explanation:

okay now i don't know this but for the pints nothing else to say bye

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!