I need to know why spiders and ticks are not insects.?

Question

i need it quick.

is there anything other than legs?

Answer 1

Insects are six legged. Spiders have eight legs.
Ticks are arachnids or acarids or mites .

Spiders, unlike insects, have only two body segments (tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an abdomen (called the opisthosoma). The exception to this rule are the assassin spiders, whose cephalothorax seems to be almost divided into two independent units. Except for a few species of very primitive spiders (family Liphistiidae), the abdomen is not externally segmented. The abdomen and cephalothorax are connected with a thin waist called the pedicle or the pregenital somite, a trait that allows the spider to move the abdomen in all directions. This waist is actually the last segment (somite) of the cephalothorax and is lost in most other members of the Arachnida (in scorpions it is only detectable in the embryos).


See:

http://en.wikipedia.org/wiki/Tick
http://en.wikipedia.org/wiki/Insect
http://en.wikipedia.org/wiki/Spider

See also:
http://edis.ifas.ufl.edu/BODY_IG088
http://www.insects.org/entophiles/arthropoda/index.html

Answer 2

All insects and spiders are bugs but not all bugs are insects or spiders. Spiders are not insects because to classify as an insect it has to have 3 main body parts, head and thorax and abdomen and they have to have 6 legs. Spiders have 2 main body parts, only the head and abdomen and have 8 legs. Other then that, it is like asking why apes are not human, they have different classifying criteria than we do so can not be called human. Spiders are classified differently and so are a different thing altogether.

Answer 3

They are Arachnids.
Insects are six legged. Spiders have eight legs

Answer 4

They are Arachnids - eight legged - unlike insects which have six legs.

Answer 5

count the legs

Answer 6

They belong to the order Arachnidae.

Answer 7

they have 8 legs, so they are arachnids