The Tautara has a double row of top teeth and the lower teeth fit inbetween the double row. Unique to vertebrates as far as I know.
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Re: Science Trivia
The Tautara has a double row of top teeth and the lower teeth fit inbetween the double row. Unique to vertebrates as far as I know.
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
Vicarius
Re: Science Trivia
a sagittal crest?
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Re: Science Trivia
Correct Phier! Your turn!
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Re: Science Trivia
Why is it that for most species the sex ratio is 1-1 and what is different in those where it is not?
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
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Re: Science Trivia
I think I broke the chain again
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
Re: Science Trivia
As to the first, dynamic equilibrium.Originally Posted by Phier
As to the second, many many things. One instance would be certain species of spider, like the black widow, which has a tendency to kill suitors.
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Re: Science Trivia
More specific please
More general please. The black widow's propensity to kill mates is highly exaggerated and their sex ratios at hatching are unknown. The question is why would the sex ratio not be 1-1 for say elephant seals but is 1-1 in humans.As to the second, many many things. One instance would be certain species of spider, like the black widow, which has a tendency to kill suitors.
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
Vicarius
Re: Science Trivia
well for elephant seals i'd say serious sexual dimorphism, which might lead to dominance hierarchies, like gorilla groups, for example, one male, a group of females, a few juvenile males hanging around.
Re: Science Trivia
If you get more dudes who are prone to making dudes then the dudes won't have enough girls and they'll die out, then the girls will take over.
This has since demonstrated itself to not be the case, but it's what I assume you're getting at.
How about ants?More general please. The black widow's propensity to kill mates is highly exaggerated and their sex ratios at hatching are unknown. The question is why would the sex ratio not be 1-1 for say elephant seals but is 1-1 in humans.
Or maybe that's too obvious.
basically any polyamorus species would fit into this, but humans can arguably be called polyamorous in some eras. So I guess I really don't know what you're getting at.
Vicarius
Re: Science Trivia
The fenestrae (at least thats's what I think who these large "holes" are called) ?
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Re: Science Trivia
The Tuatara question has been answered already man.
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Re: Science Trivia
Correct enough. Basically if the cost of making males is the same as making females, any shift in equilibrium will favor the other sex. Even in cases where the species are polygamous.
The issue is with cost again. In species where its cheaper to make one sex over another, due to size or whatever, you will see an unbalanced sex ratio based on that difference.How about ants?
Or maybe that's too obvious.
basically any polyamorus species would fit into this, but humans can arguably be called polyamorous in some eras. So I guess I really don't know what you're getting at.
You were pretty close to correct, and were correct for part one so your turn!
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
Re: Science Trivia
Yay for my ineptitude.
Alrighty, now I need to think of a question...
Ah, why do cyclotrons require beam focusing?
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Re: Science Trivia
Don't feel bad its not an easy question, no one else even tried
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
Re: Science Trivia
For someone who studied biology I should be pretty down though, lol.Don't feel bad its not an easy question, no one else even tried
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Re: Science Trivia
I have 3 degrees in biology, including 2 advanced ones, and this stuff was barely covered. I only know it because of my reading AFTER my degrees.
A good one to refresh yourself on is 'The Red Queen' by Matt Ridley, you can find it on Amazon or a lot of bigger book stores.
"When I die, I want to die peacefully in my sleep, like Fidel Castro, not screaming in terror, like his victims."
My shameful truth.
Vicarius
Re: Science Trivia
Because unfocused ion beams have big energy spreads and are generally unstable, leading to energy loss and a loss of efficiency?
That's my best guess. I suck at physics.
Re: Science Trivia
Because if the beam was not focused it (the beam) would be dissipated my the strong magnetic fields involved. That's my best guess. this is where i got my info, please correct me if i'm wrong.
Re: Science Trivia
This is correct, as the other poster was, but his was more vague. The phenomenon is called betatron oscillation, and is not caused because the magnetic field is strong, only because it's there, and gradually diverts the beam due to lorentz forces.
Re: Science Trivia
Thanks for the Info
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