Question

Which of the following is not a symbiotic relationship?

Mutualism
Trophism
Commensalism
Parasitism

Answer 1

@jagr2713

Answer 2

@leonardo0430

Answer 3

@WhatEven

Answer 4

what do you think @geny55

Answer 5

b?
@jagr2713

Answer 6

@jagr2713

Answer 7

Correct :D

Answer 8

Symbiosis is when two members of different species interact, in which one of them benefits from this relationship.
Trophism is movement - for example, phototrophism in which a plant moves toward a light. It has no relation toward symbiosis at all.

Mutualism is when both organisms benefit from the relationship. Like with alligators and birds. Alligators protect the birds while the birds live off of the food in the alligators.

Commensalism is when one organism benefits from the relationship, and the other organism is not hurt nor helped. EX:Orchids Growing on Branches of Trees

Parasitism is when one organism, the parasite, benefits from the other organism, called the host, and in turn harms the host. An example is a leech - it hurts the host to get blood.

trophism should be the correct answer

Answer 9

@galegomez Symbiosis is not what you described. Symbiosis is just a close relationship between species. Mutualisms, commensalisms, and parasitisms are all types of symbioses.

I'm not sure which birds you are talking about with the alligators. I have not heard of any bird species alligators protect, and you description is not a mutualism. In mutualisms both species receive a fitness increase, but what you have described does not detail a fitness benefit to the alligators.

I think you may be thinking of the birds that pick food out of the mouths of crocodilians. Is this the case? This is a mutualism because the birds receive food with very little effort and the crocodilians have pieces of food removed from their mouths. Pieces that just like in humans, could cause tooth and gum infections by build up of bacteria and the like.

Answer 10

@mrdoldum Yeah, sorry wrong species I was talking about! Thank you for telling me what it was, could've made a fool of myself! heh

Answer 11

@galegomez Nah, you clearly remember the two organisms, just forgot a couple details. It is pretty interesting watching those birds, I think the even step into the mouths every now and then.

Ever watch Farscape? Reminds me of the episode when the human lost in space wants to brush his teeth and one of the aliens hands him a small worm that you hold in your mouth and it does the cleaning.

Answer 12

@mrdoldum Those birds are pretty hardcore to be stepping in their mouths and yeah I love Farscape! It's more of a mutualism between the human and the small worm than anything, I think that's where you're going with that.

Answer 13

Yes, their both mutualisms.