Last week we showed you a picture of a centipede. The bolas spider, for example, spins a single line of silk with a drop of sticky silk at the end. When an insect flies near, this spider swings the line at it and traps the insect in the sticky ball. Taranulas, jumping spiders and wolf spiders just wander around looking for food and mates. He knew this from the Croc Files .
All spiders have venom and use it to help capture prey.
No one even wanted to guess at this one. A biological indicator is an organism used to measure things in the environment such as pollution. An example would be if a scientist knew frogs were sensitive to pollution. Then when the scientist looks at a river he notices there are no frogs down stream from a chemical factory. He then knows to take a closer look at the chemical factory.