There are two organisms with overlapping ranges and filling a similar niche. We find that where their niches overlap, there is twice the competition for resources. This leads to

It will lead to competitive exclusion .

Explanation:

Competitive exclusion occur when two organisms occupying a niche compete for resources and one organisms outcompete the other leading to the exclusion of the other one from the niche. This occur if two organisms have overlapping niches which tend to lead to pressure on the resources available as a result of competition, one organisms adapts, compete and thrive well and the other one is excluded.

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!