In what way can you determine whether to use who or whom in a relative clause? select all that apply.

a. whom is used as a subject.
b. who is used as a subject.
c. whom is used as an object.
d. who is used as an object

Option B and C

Explanation:

In case of relative clause , the object and subject of the sentence is determined by looking at the state of the verb.

The best and easiest way to do so is by asking questions with respect to the verb

a) The answer obtained in lieu to the question asked as "who" is doing the action defined by the verb in any sentence is the subject of the sentence

b)The answer obtained in lieu to the question asked as upon "whom" is this action being done as defined by the verb in any sentence is the object of the sentence

 Hence, option B and C are correct

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!