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​
