Question

Where would you find methanogens, which can function only in the absence of oxygen?
A roots of plants
B human intestine
C synthetic fertilizers

Answer 1

@Elvia ... where would oxygen be absent among the options you've provided?

Answer 2

Synthetic fertilizers

Answer 3

Human intestine

Answer 4

Roots of plants

Answer 5

Synthetic fertilizers : are “Man made” inorganic compounds - usually derived from by-products of the petroleum industry. Examples are Ammonium Nitrate, Ammonium Phosphate, Superphosphate, and Potassium Sulfate.
Now...
the methanogenic bacteria are related to each other primarily by their mode of energy metabolism but are very diverse with respect to their other properties.
Methanogenic bacteria obtain their energy for growth from the conversion of a limited number of substrates to methane gas.

and roots need oxygen..as well as human intestine...Soo
What you think? @Elvia

Answer 6

Human intestine am I right?

Answer 7

It's synthetic fertilizers

Answer 8

It's the human intestine actually because the human intestine is devoid of oxygen and it is only the anaerobes which can survive in that environmental conditions. The options are pretty tricky. The synthetic fertilizer when added to the soil will have access to oxygen in the air.

What do you think @Ryaan?

P.S: Piece of evidence that there's no oxygen in the intestine: http://www.ncbi.nlm.nih.gov/pubmed/21073287

Answer 9

So I was right

Answer 10

Elvia when you're sure about answers don't asks here.:p

Answer 11

I was not sure really this is very hardcore with your help I can do this

Answer 12

"Due to the oxygen lacking characteristic of the large intestine, the organisms that thrive in this niche are anaerobes. "

Got it from here: http://microbewiki.kenyon.edu/index.php/Large_Intestine

Answer 13

I have two more questions please help

Answer 14

Kayne will answer you better..

Answer 15

You both are very good and smart

Answer 16

LOL except me:p

Answer 17

@Elvia .. @Ryaan is right. If you're sure about something you may try just double check it online with all of the stuffs available on the internet.

@Ryaan please help @Elvia .. You're great at explaining things ^^ I got to go. I'll see you guys later. :)

Answer 18

Please stay on

Answer 19

@Elvia I really need to leave but there's @Ryaan and others here to help. Don't forget to give them medals when they are helping you.. and always thank them for their invaluable help.

Always make good use of OpenStudy! Cheers!

Answer 20

I will and thank you so much for helping me in need your awesome both of you

Answer 21

Next question coming up