monera kingdom

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canalon
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Post by canalon » Tue Jun 07, 2005 8:50 pm

mithrilhack wrote:Yeah, monera was split into eubacteria(new) and archaeobacteria(old). I guess they found the genes diverged too much..


Eubacteria means "real bacteria". Archaebacteria means the "old bacteria" because the first to be discovered were extremophiles and were thought to be the ancestor of the other bacteria. But more recent phylogenies studies are rather putting them as closer to the eucaryotes than to the eubacteria. Another misnomer in biology :(

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kandarp shah
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archaeobacteria habitat

Post by kandarp shah » Tue Jun 07, 2005 10:04 pm

mithrilhack wrote:nope, archaebacteria are extremophiles...living in highly salty, hot/cold...extreme environments. Virii aren't alive. More discusion on that if you search the forum.

as i know about six kingdoms..... archaeobacteria are only survive where there is no oxygen. they live is harsh places .
example are solt loving bacteria, hot loving bacteria
yup :lol:

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Post by MrMistery » Wed Jun 08, 2005 7:31 pm

Bergey's manual of bacteriology(i hate that book-really hard- but it is generally reffered to as the best) suggests:
- Archebacteria be called archea... This is actually happening... I've had a number of college professors yell at me for calling them archebacteria
- Not using the term Eubacteria to define the kingdom, simply use Monera. A lot of books refer to "Kingdom eubacteria" although officially it doesn't officially exist

Yes, archea is closer to eukaryotic cells than bacteria:
- DNA has introns
- The rRNA in the big unit of ribosoms resembles extremely much to that of eukaryotic cells
- they react different to antibiotics and toxins
- Archea lack murein in the cellular wall, some species don't even have it
- Archea have different lipids in the cellular membrane
And a lot of other stuff :wink: :wink:
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victor
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That sounds new

Post by victor » Mon Jun 13, 2005 11:36 am

Wow, I've just known 'bout that...from 2 years ago when I studied classification, it's written in my book that virii is classified into one of the six kingdoms as a new kingdoms. But now, it has been replaced with archae...thanks for the information :P

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Post by MrMistery » Mon Jun 13, 2005 7:53 pm

I am really concerned with what book you are studying victor. I doubt viruses were ever defined as alive... Not 2 years ago anyway

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Post by biostudent84 » Mon Jun 13, 2005 8:08 pm

MrMistery wrote:I am really concerned with what book you are studying victor. I doubt viruses were ever defined as alive... Not 2 years ago anyway


The jury isn't out yet on that yet. Half the scientists say viruses are alive, the other half say they aren't. We've even had debates here about it....but there has yet to be a consensus reached.

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Post by b_d_41501 » Mon Jun 13, 2005 8:33 pm

But define alive?? That's the problem
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Post by biostudent84 » Mon Jun 13, 2005 8:54 pm

b_d_41501 wrote:But define alive?? That's the problem


According to Cell Theory.....if you are made of cells, then you are alive.

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Post by th1_rhs13 » Mon Jun 13, 2005 11:08 pm

But Viruses are non cellular And can only replicate within a host.

Granted they are made up of either RNA or Dna.

Also its reproductive cycle never denotes the creation of cells, only the use of a host cell. The steps are as follows. Cited from my Bilogy notes. Also Virus is not a Kingdom of life.


Viral Reproduction

• Adsorption –
Host attachment
Use receptors

• Penetration –
Injection of nucleic acid and/or entire virus
Injection – Virus injects nucleic acid
Endocytosis – Fusion of viral membrane with host cell membrane

• Biosynthesis-
Makes viral parts
Use of H.C. machinery

• Assembly-
Putting parts together

• Release-
Lytic cycle – Lyses host cell
Lysogenic cycle – virus becomes latent before H.C. destruction

Simple curiosity, what level of Biology are you studying (all reading this)? It seems many of your sources and questions are emphasized on High School level Biology. I never took a Lab In HS, I only I have what was acquired within my University studies.

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Post by biostudent84 » Tue Jun 14, 2005 1:33 am

True. I think it's accurate to say that viruses don't reproduce, they replicate.

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victor
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I got it!!

Post by victor » Tue Jun 14, 2005 12:52 pm

Ok I got it now...simple theory..considered tobe alive if it reproduces. But, virii replicate not reproduce..But, How about Biosynthesis stage...virii reduplicating their parts?? can it called as a reproduction?

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Re: I got it!!

Post by biostudent84 » Tue Jun 14, 2005 7:30 pm

victor wrote:Ok I got it now...simple theory..considered tobe alive if it reproduces. But, virii replicate not reproduce..But, How about Biosynthesis stage...virii reduplicating their parts?? can it called as a reproduction?


Like I said, the jury still isn't out on that one. It's best to wait until people smarter than us decide whether or not viruses are living, rather than arguing a debate that the best in the field is still trying to decide...

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