Protoctists?

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

User avatar
opuntia
King Cobra
King Cobra
Posts: 538
Joined: Wed Jun 15, 2005 6:39 am
Location: Maldives(the chain of islands)

Protoctists?

Post by opuntia » Tue Jul 05, 2005 4:56 pm

What is protoctists? The meaning is not in the dictionary..the word came up as i was going through the plant life cycle.
"The roots of education is bitter, but the fruit is sweet" Aristotle

ERS
Inland Taipan
Inland Taipan
Posts: 137
Joined: Thu Dec 16, 2004 5:13 am

Post by ERS » Tue Jul 05, 2005 6:01 pm

are you thinking Protistas??

ERS

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Tue Jul 05, 2005 8:43 pm

@ERS
According to current biosistematics protoctista=protista
@opuntia
The eukarya kingdom is divided into 4 kingdoms: Protoctista(Protista), Fungi, Animalia and Plantae.
Prtoctists are algea, protozoars, oomycets and mixomycets
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

ERS
Inland Taipan
Inland Taipan
Posts: 137
Joined: Thu Dec 16, 2004 5:13 am

Post by ERS » Tue Jul 05, 2005 9:22 pm

been a while since I have studied them, thanks for the update!
ERS

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Tue Jul 05, 2005 9:27 pm

The first kingdome Protista had only unicellular organisms in it(both procaryotes and eukaryotes). So when they redid the clasification, the renamed the kingdom protoctista(to avoid confusions). But in the present they are both accepted
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

strutter
Garter
Garter
Posts: 2
Joined: Wed Jul 06, 2005 3:21 am

Re: Protoctists?

Post by strutter » Wed Jul 06, 2005 3:25 am

opuntia wrote:What is protoctists? The meaning is not in the dictionary..the word came up as i was going through the plant life cycle.


Protoctista's are single celled organisms. They live in watery environments. Examples of protoctista's are Slime moulds, Algae, and Yeasts

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Wed Jul 06, 2005 5:58 pm

Not only single cell organisms. Never make that confusion. Multicellular algae and pseudofungus is also part of the Protoctisa kingdome
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
victor
King Cobra
King Cobra
Posts: 2668
Joined: Sat Apr 30, 2005 12:01 pm
Location: Yogyakarta, Indonesia..
Contact:

Post by victor » Thu Jul 07, 2005 6:18 am

MrMistery wrote:@ERS
According to current biosistematics protoctista=protista
@opuntia
The eukarya kingdom is divided into 4 kingdoms: Protoctista(Protista), Fungi, Animalia and Plantae.
Prtoctists are algea, protozoars, oomycets and mixomycets


Eukarya kingdom is divided into 4 subkingdoms... :lol:
Yup, since the ancestor have a nuclei membrane..
Q: Why are chemists great for solving problems?
A: They have all the solutions.

User avatar
Dr.Stein
King Cobra
King Cobra
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia
Contact:

Post by Dr.Stein » Thu Jul 07, 2005 2:10 pm

According to the latest classification, there are 6 kingdoms of living things:
- Archaebacteria (Prokaryota)
- Eubacteria (Prokaryota)
- Protoctista a.k.a Protista (Eukaryota)
- Mycota a.k.a Fungi (Eukaryota)
- Plantae (Eukaryota)
- Animalia (Eukaryota)

Protoctista is a kingdom of unicellular organisms, which live solitary, colony, or in filament shape. The members of this kingsom is animal-like, plant-like, or fungus-like. That is the idea for a suggestion that Protoctista is the ancestor of the next kingdoms: Mycota, Plantae and Animalia.

The representative species for this suggestion is Euglena sp. It has a characteristic of animal: having 'eyes' and locomotion appandage, the flagella), but it also has a characteristic of plant: having chloroplast to mean photosynthesis. When light is available, they undergo photosynthesis; whereas when there is no light, they will phagocytosis materials from their surrounding.
Image

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Thu Jul 07, 2005 6:45 pm

Sorry, my mistake: i meant the eukarya domain is divided into 4 kingdoms.
Protoctista is a kingdom of unicellular organisms

For the 3rd time i think, there are multicellular protistas: most of the Rhodophytas: Gelidium, Gracilaria, Dasya, Porphira. Multicellular Chlorophyta: Spirogyra, Cladophora, Ulva, Chara
Only a few examples
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

User avatar
Dr.Stein
King Cobra
King Cobra
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia
Contact:

Post by Dr.Stein » Fri Jul 08, 2005 1:32 pm

Waaaks! :shock: I have no idea where my sentence "...However, it also includes multicellular organisms particularly belong to algae groups etc. etc...." Sorry, I must deleted it by accident :( :roll:
Image

User avatar
MrMistery
Inland Taipan
Inland Taipan
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)
Contact:

Post by MrMistery » Fri Jul 08, 2005 6:58 pm

Haha... We all make mistakes... I am wrong at least once a week on this forum
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests