2006-07-21 04:50:43 · 6 answers · asked by Elmo 1 in Science & Mathematics ➔ Zoology
yes so when they are on a hill they can roll away
2006-07-21 08:07:08 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Not all of them. Some woodlice roll into a ball-like form when threatened by predators, leaving only their armoured back exposed.
2006-07-21 11:58:44 · answer #2 · answered by wolfmano 7 · 0⤊ 0⤋
Rolling up into a ball may confer a survival advantage; they may have been exposed by some animal rooting under a piece of wood, and are more likely to roll off into the forest floor detritus (fallen leaves, etc.) and become unfindable.
2006-07-21 12:29:22 · answer #3 · answered by kirchwey 7 · 0⤊ 0⤋
The majoriy of their predators are small, typically spiders. This defence mechanism evolved as a way of concealing their softer and more vulnerable underbody which is vulnerable to attack by spiders and many hemipteran predators (true bugs). The natural defence reation, applies to all sorts of threats, howver it does seem pretty useless in defending the animals against us, but they do make for some really interesting questions....hahaha
2006-07-21 12:32:44 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Some of them just pull in their legs and 'stick' to the floor.
2006-07-21 12:13:54 · answer #5 · answered by Sonia M 2 · 0⤊ 0⤋
no not the tough ones, they have flick-knives
2006-07-21 11:54:40 · answer #6 · answered by rompa_stompauk 2 · 0⤊ 0⤋