My teacher Ms. Williams gave us an bonus assignment on it.
So help me, people
2007-10-08 09:44:30 · 8 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Sharks never sleep. They have no swim bladder (which keeps fish floating), like other types of fish...so if they stopped swimming they would sink and die. Sharks have evolved with the ability to keep moving 24/7. If they slept, they would sink.
2007-10-08 09:50:42 · answer #1 · answered by artistagent116 7 · 1⤊ 0⤋
All of the 'vertebrates' sleep, some sleep oddly, like ducks sleep 1/2 of their brain at a time. The trick part of the question is what to include as an animal. How about a slug? How about a spider? If they are in the animal kingdom
http://www.kidport.com/RefLib/Science/Animals/Animals.htm
and an invertebrate, they may not sleep, and all you need to find is one of them that doesn't sleep. I suppose you could argue that you need a brain for sleep (unless dormancy counts), so that is another trick in the question, many critters don't have a brain.
2007-10-08 09:54:06 · answer #2 · answered by Will B 5 · 0⤊ 0⤋
Fish
Sharks
2007-10-08 09:48:16 · answer #3 · answered by J_B_BaLlin 3 · 0⤊ 0⤋
sharks don't really sleep .
Mammal Total Daily Sleep Time (in hours)
Giraffe 1.9
Roe deer 3.09
Asiatic elephant 3.1
Pilot whale 5.3
Human 8.0
Baboon 9.4
Domestic cat 12.5
Laboratory rat 13.0
Lion 13.5
Bats 19.9
2007-10-08 09:49:59 · answer #4 · answered by ? 2 · 0⤊ 0⤋
most of the fish or aquatic kingdom do not sleep .. although some become comatose for periods .. for more see here
http://faculty.washington.edu/chudler/ordol.html
2007-10-08 09:49:22 · answer #5 · answered by The old man 6 · 0⤊ 0⤋
no all animals need sleep
2007-10-08 09:49:46 · answer #6 · answered by raquel d 1 · 0⤊ 1⤋
your mom
2007-10-08 09:47:05 · answer #7 · answered by mt9495 2 · 1⤊ 0⤋
well it's bonus it won't hurt you, but idk.
2007-10-08 09:50:04 · answer #8 · answered by Neoixan 2 · 0⤊ 0⤋