1. The_____________
allows humans and animals to respond to their
environments and to move and act in their environments.
a. nervous system
b. respiratory system
c. green chlorophyll
d. backbone
2. ________have a nervous system that consists of three main parts.
a. Protists
b. Vertebrates
c. Invertebrates
d. Monerans
The most highly developed brain is in_________.
a. fish
b. monkeys
c. elephants
d. human beings​