1. what is the respiratory structure of a millipede?
a. book lungs
b. tracheal tube
c. gill slits
2. what is the respiratory structure of a spider?
a. gills
b. book lungs
c. tracheal tube
d. gill slits

Astudent conducts an experiment to determine how the amount of water given to a plant affects it growth what is the dependent variable for this experiment

~~16. while watching a special on animals, brianna discovers that hares tend to lose heat through their ears. based on this and what is known about surface-to-volume ratios, propose an explanation as to why hares that live in hot climates (such as the desert) have large, extended ears

Which of the following is not a defining characteristic of plants?