Susan's Place Transgender Resources

How many legs does an octopus have?

Why do I get the feeling I am being tricked?  :-)

What, by sweet lill old me?

An octopus has no "legs" whatsoever.

It has four pairs of "arms."

Quote from: Jamie D on May 14, 2013, 04:21:00 AM
An octopus has no "legs" whatsoever.

It has four pairs of "arms."

Wrong.

Oh BTW I also have a degree in Marine Biology as well as the others  :embarrassed:

6

:3

Quote from: kyh on May 14, 2013, 04:41:44 AM
6

:3

Nope!!

And I reckon searching Google is illegal!!!

*got caught*

Take me to jail xD

8 tentacles no legs

Nope.

Jail for kyh!!!!!

Two, so they can walk to the car.

OK smarty bum.

I bet you cheated  :laugh:

Octopus have two legs and six arms

http://www.dailymail.co.uk/sciencetech/article-1044162/How-arms-does-octopus-Only--legs-say-scientists.html (http://www.dailymail.co.uk/sciencetech/article-1044162/How-arms-does-octopus-Only--legs-say-scientists.html) for a lay link.

Which is the same as other Cephalpods BTW

Quote from: Cindy. on May 14, 2013, 06:07:40 AM
OK smarty bum.

I bet you cheated  :laugh:

Octopus have two legs and six arms

http://www.dailymail.co.uk/sciencetech/article-1044162/How-arms-does-octopus-Only--legs-say-scientists.html (http://www.dailymail.co.uk/sciencetech/article-1044162/How-arms-does-octopus-Only--legs-say-scientists.html) for a lay link.

Which is the same as other Cephalpods BTW

I won fair and square, no need for name-calling. Sheesh.

I remember Home Made Tiramisu !!!!

Congrats to Devlynn


mutter mutter :laugh:
:-*

Bet you don't know how many teeth a mosquito has?

Two, to hold that straw they drink my blood through?

Ha, she says in an entomologically dismissive sneer.

I was actually asked this question in a quiz contest and knew the answer much to the shock of everyone else because I had been a miserable failure at all the others.

Ok, I'm curious...why do we say they have 2 legs and 6 arms?

ETA: Ok, read the "lay link" provided earlier.

Who'd've thunk?

ATTENTION: DO NOT GOOGLE THE TERM "MOSQUITO TEETH." YOU ARE RESPONSIBLE FOR ANY AND ALL CONSEQUENCES OF VIEWING MOSQUITO TEETH IMAGES.



I didn't put that can there!

but otherwise they are the same and can perform the same function as the other tenticles? So is the only definition of a leg then, that it is a locomotary appendage? I mean, you can walk on your hands but it doesn't make them feet! But then what does define the difference?

Great, thanks Cindy, now I can't tell the difference between feet and hands! If I drop my coffee trying to pick it up with my toes, I am going to sue!

Steph :-)
x

Quote from: Cindy. on May 14, 2013, 04:31:18 AM
Wrong.

Oh BTW I also have a degree in Marine Biology as well as the others  :embarrassed:

Quote from: Cindy. on May 14, 2013, 06:07:40 AM
OK smarty bum.

I bet you cheated  :laugh:

Octopus have two legs and six arms

http://www.dailymail.co.uk/sciencetech/article-1044162/How-arms-does-octopus-Only--legs-say-scientists.html (http://www.dailymail.co.uk/sciencetech/article-1044162/How-arms-does-octopus-Only--legs-say-scientists.html) for a lay link.

Which is the same as other Cephalpods BTW

I protest!

Let me quote from the textbook, Invertebrate Paleontology, by the late Professor William Easton:

Order Octopodia (pg 474-478)

"... In this regard it is appropriate to mention that the largest octopus for which authentic measurements are available is species on the Pacific Coast of North America which reaches a diameter of 28 feet (6.5 m) when the arms are extended....

The first octopods appear in the late Cretaceous as the unique genus Palaeoctopus, from Lebanon (Fig. 11.39.3).  This specimen has an ink sac, two triangular fins, a partial umbrella, a single row of suckers on each arm, and is about 15 cm long....

Unlike the other coleoids, there is almost no evidence bearing on the origin of the Octopodida.  They are dibranchiates but they only have eight arms, whereas the other coleoids have ten arms.  It has been presumed by some authorities, therefore, that the Octopodia evolved from some other coleoids by complete loss of the conch and by reduction in the number of arms ... In this latter case, the eight arms of Ocotpodida would be homologous with the eight groups of tentacles in Nautilus."

Similarly, in the textbook Invertebrate Fossils, by Moore, Lalicker, and Fischer, discussing the morphology of the living cephalopod, Loligo (pg 336-338):

"Loligo is a streamlined creature, generally about 30 cm (1 ft.) in length, divided into a long, tapering body and a rounded head.  The head carries a pair of large eyes, which, like our own, possess a lens.  The mouth, located at the anterior end, is surrounded by ten muscular tapering arms studded with sucker disks.  Two of these (tentacles) are much longer than the others, and their suckers are concentrated in "hands" at the end."

The point I make is that that physiological function of a "leg" is both weight-bearing and locomotion.  In the case of the octopus, those are not the function of their tentacular arms.

Quod erat demonstrandum

Quote from: Jamie D on May 14, 2013, 03:34:37 PM
I protest!

Let me quote from the textbook, Invertebrate Paleontology, by the late Professor William Easton:

Order Octopodia (pg 474-478)

"... In this regard it is appropriate to mention that the largest octopus for which authentic measurements are available is species on the Pacific Coast of North America which reaches a diameter of 28 feet (6.5 m) when the arms are extended....

The first octopods appear in the late Cretaceous as the unique genus Palaeoctopus, from Lebanon (Fig. 11.39.3).  This specimen has an ink sac, two triangular fins, a partial umbrella, a single row of suckers on each arm, and is about 15 cm long....

Unlike the other coleoids, there is almost no evidence bearing on the origin of the Octopodida.  They are dibranchiates but they only have eight arms, whereas the other coleoids have ten arms.  It has been presumed by some authorities, therefore, that the Octopodia evolved from some other coleoids by complete loss of the conch and by reduction in the number of arms ... In this latter case, the eight arms of Ocotpodida would be homologous with the eight groups of tentacles in Nautilus."

Similarly, in the textbook Invertebrate Fossils, by Moore, Lalicker, and Fischer, discussing the morphology of the living cephalopod, Loligo (pg 336-338):

"Loligo is a streamlined creature, generally about 30 cm (1 ft.) in length, divided into a long, tapering body and a rounded head.  The head carries a pair of large eyes, which, like our own, possess a lens.  The mouth, located at the anterior end, is surrounded by ten muscular tapering arms studded with sucker disks.  Two of these (tentacles) are much longer than the others, and their suckers are concentrated in "hands" at the end."

The point I make is that that physiological function of a "leg" is both weight-bearing and locomotion.  In the case of the octopus, those are not the function of their tentacular arms.

Quod erat demonstrandum

Unlike fossils, both living and dead, science is dynamic and moves forward :-*

Quote from: Cindy. on May 14, 2013, 05:42:59 PM

Unlike fossils, both living and dead, science is dynamic and moves forward :-*

I'm very disappointed with the insults. A fossil? Does Jamie even look remotely like she's made out of stone? Er, don't answer that.

In this case, ontogeny does recapitulate phylogeny.

Since fossils are used as evidence against creationism, can we suggest Jamie wasn't created, just imposed?

Quote from: Jamie D on May 15, 2013, 02:24:19 AM
In this case, ontogeny does recapitulate phylogeny.

Is it sad that this made me laugh?