Turtles aren't exactly the smartest creatures; but they are smart enough to know about what to eat and hiding from predators and such. You can't really teach them tricks if that's what you're getting at ;)
Yes. Just about any carnivore or predator coming across a turtle will at least try to eat it. Coyotes and wolves and badgers are smart enough to turn the turtle over to get at the softer underbelly. Larger ferrets or weasels especially the Fisher enjoy a bit of turtle now and then.
They can be if you take good care of them. They grow fast very quickly, and their nails are very sharp. Make sure that any kids are supervised when around the turtle, because I, and many others have almost dropped the turtle because of their strength, and sharp nails. Always make sure you hold a turtle with both hands, and never 2 turtles at once. Make sure you have plenty of room for a tank, which if you have the turtle for long enough, will get to be more than 20 gallons. I have a 30 gallon tank with more than 11 gallons of water in it. If you want a clean pet, then I recommend you don't get any turtle in general. They are very messy, and require weekly filter replacements, and monthly tank cleanings. If you are getting/have a tank that is to big to fit in the sink when tilted (probably about 20 gallons at the most for sinks.) Then get a water vacuum. These take out water with suction (there's no need for electric ones, unless you can not reach over the glass.) If you are not prepared for a complicated, messy pet, then a turtle is not the right pet for you.
labradors are preatty smart dogs. They make a great companian and are great guide dogs.
vinegar is a low grade acid so of course it has killing potential but if you dont get to the colony you will be doing it agin and again
as smart as poo
yes
I have two red-eared sliders, and a yellow-bellied slider. I feed them once a day, everyday. I feed them all at the same time--in the morning. It is usually between 6-7am during the school year, or 9-12am over summer break. I use turtle food bought from Pet Smart. In it is mini sticks (scientist made stuff,) mini shrimp, and baby krill. My turtles eat a lot for their size(1inch in diameter)--about 15-20 pieces.
at pet smart
turtles are smart you can train them a few things just like i did to mine
Donatello
Smart? It would be genius. The X11 is an amazing headset.
Not if you are smart and don't put them together. Amphibians poison the water for fish.
Smart (smart cars)
the hermit crab cage is not big enough nor does it have propr ventilation for a turtle. at pet smart they have very cheap turtle cages.
Get Smart - 1965 I Am Curiously Yellow 5-26 is rated/received certificates of: Argentina:Atp
I would say no. They may be turtles with small brains but they are smart, I can tell, and even if their buddy died I doubt they'd eat him. Once, after a few days of not feeding my turtles since I was forced to make them eat cucumber slices to cure my smaller one, the bigger turtle took a snap at the other one's head, but I am unsure if this is out of hunger or out of annoyance. But still, I think they are not cannibals.
Yellow teeth is not proven to cause cancer. People should be smart however, and take care of their teeth and gums.