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>> RiderFan !!o7sFgCyZbre
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>>482685

This is /u/. You once tried to lecture this board about the rules.

GTFO, Riderfag.
>> Anonymous
>>482688
oh my god you people
one person posts sexy pictures HOLD ON IT'S SLIGHTLY IMPLIED LESBIANISTIC CONTENT ACK HOW DARE YOU GET IT THE BONERFUCK OUT OF MY /E/ I've soiled myself
>> Anonymous
>>482688
This post is awesome. This thread is awesome. Internets for everyone.
>> Anonymous
is a bird considered a mammal
>> Anonymous
>>482822
Best Answer - Chosen by Asker
No, birds are not mammals. Modern systematics (phylogenetic systematics or cladistics) define all groups by shared derived characters - synapomorphies-. Thus, mammals as a crown group (that is, considering only all the living species and their latest common ancestor) are tetrapod vertebrates with fur, with lower jaw formed by a single bone (the dentary), middle ear with three ossicles, and which nurse their young with milk. There are more characteristics of the group, but any animal that fulfills these conditions is a mammal.
The crown-group of birds (Aves) includes vertebrates with feathers, with a beak covered in a horny sheath, lacking teeth, and which lay eggs with a special shell mineralization type; also they have several skeletal specializations. However, many of these traits are shared with non-avian archosaur reptiles (especially dinosaurs) - which is why I mentioned the crown-group.
These characteristics of birds and mammals are mutually exclusive. The last common ancestor of these groups was a basal Paleozoic amniote, because the reptile line that gave origin to mammals (the Synapsida) was already differentiated by the end of the Paleozoic, whereas birds evolved within the Archosauria (Sauropsida diapsid reptiles) in the Mesozoic Age.

yahoo answers ;P
>> Anonymous
>>482658
western draw shit is shit
>> Anonymous
>>482688

shut up
>> Anonymous
>>482822
>>482825
/e/ - The place to go for fap and K-12 homework help.
>> Anonymous
>>482822
Birds are derived from reptiles, not mammals.
>> Anonymous
>>482688

Get the fuck out.
>> Xenos
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>>482633

That game was awesome. glad someone still remembers it.
>> Anonymous
>>482688
ur fuckin brilliant faggot, gtfo
>> Anonymous
>>482688
while I do hate Riderfan, your argument falls on deaf ears. mods won't ban the prick for this
>> Anonymous
>>482761
>>482828
>>482908
>>484231
>>484248
Idiots. It's not about getting him banned, it's about him having a rather massive double standard, like posting /u/ while acting like some fucking champion of "christian morality."
>> Anonymous
>>482622
you have more of that?