00:01
So if we consider different ways for bacteria to survive in a harsh environment, you can imagine what they're going to do is, say, in a high salt environment, they're going to try and prevent the loss of water.
00:15
In an environment where there's a lot of heat, they're going to try and prevent the cell membrane from being ruptured and destroyed and from being changed in formation.
00:25
So for the most part, what we're looking at is a process that helps keep the cell membrane from being compromised and from having all the cell contents leaked out or lost from the cell.
00:44
So if we look at our answer choices for surviving a harsh environment, we have apilis, we have heterocysts, we have endospores, and we have plasmids.
01:07
So we'll start at the top.
01:08
Apilis is something that cells use to move plasmids from one.
01:13
Cell to another.
01:19
So this process is more of a gene transfer technique called a horizontal transfer technique because it's moving to dna from one cell of the same generation to another cell.
01:34
So a pillus doesn't really help the cell survive.
01:38
It pretty much helps a population of bacteria grow custom to a change that dna or rna can deal with.
01:47
So a is not our best option.
01:51
B, a heterocyst, is something you'll see in a microscope where you have an unusual thickening of like a cell, where it's thickening the cell wall to help survive in a harsh environment.
02:07
So this is a possibility for our choice.
02:09
We'll take a look at it later...