Homework help....... (Help me out please)?

Question

1. Malpighian tubules are _____ structures found in _____.

reproductive; crustaceans

excretory; insects

respiratory; spiders

skeletal; starfish

2. Scorpions and ticks are classified as _____________.

crustaceans

insects

diplopods

arachnids

3. For gas exchange, insects use ______ while spiders use _____.

tracheae; book lungs

gills; tracheae

book lungs; gills

gills; book lungs

Answer 1

Telling you the answer isn't really helping you.

Answer 2

1 is excretory; insects

2 is arachnids

and 3 is tracheae; book lungs

what a dingbat you must be!.......3 was an obvious give away since gills are indicative of underwater inhabitants such as fish and neither insects nor spiders fall into that description!...that one was process of elimination alone since 3 of the answers had the word gills in them that should have pretty much left only 1 possibility wouldnt ya think!?!