Arthropods do not grow very large because a) they do not have the muscles to support the weight of a large exoskeleton
b) they can not conserve water
c) they have a ventral nervous system
d) they have a poor respiratory system

Which answer correctly lists the four main types of animal tissue?

The hidden observer theory of hypnosis emphasizes the role of hypnosis. a) habituation b) suggestion effect c) dissociation

This is an ap world history question. i am working on a worksheet which has a vent diagram with each circle labeled either us or byzantine economy. the middle is the similarities. can someone explain to me the similarities and especially the differences between the two?