00:01
Okay, so here in problem four, we're sort of discerning between these five interaction, which one fits the bill described.
00:09
And so when we look at these, we have mutualism.
00:14
And mutualism is going to be when both organisms benefit, right? so it's this sort of like, if we had sort of the actor here and the recipient here.
00:32
So they both benefit in some way.
00:35
So this is like nitrogen fixing bacteria, right? so the bacteria sort of gives the plant nitrogen and the plant is giving the bacteria a place to live.
00:49
So they're both better off.
00:51
And then you get to commensalism.
00:55
That nice long word to write out.
00:59
And this one is where one of them benefits.
01:04
And the other one is sort of neutral, completely neutral.
01:07
So this is like a little bird, you know, maybe standing on the back of an alligator that is, you know, crossing the river, right? so it gets a free ride, and this alligator is going to be not really affected in any way.
01:29
Apparently even notices the bird.
01:33
Okay, so then we get to parasitism, right? so paracetism...