Apopulation carries two alleles at a locus. one allele has a miniscule fitness advantage. what is the long-term fate of the locus if natural selection is the only important evolutionary force? group of answer choices the population size will decrease. the population size will increase. eventually the beneficial allele will be fixed by natural selection. both alleles will remain in the population at a ratio proportional to the fitness difference. the allele at a disadvantage will mutate to improve to the fitness level of the other allele.

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

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!

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.