CH 16

Question 1

when animals emerged, they were able to behave differently than plants. This was thanks to a new type of cell: a ____

Answer 1

neuron

Question 2

t/f
in every animal w a nervous system, neurons have the same morphology and function

Answer 2

true!!

from humans to jellyfish

Question 3

How do researchers think the animal nervous system evolved?

Answer 3

through the co-opting of genes with other functions, such as cell-cell communication in single cell eukaryotes

Question 4

_____ might represent a transitional stage in the evolution of nervous systems b/c they might’ve evolved some of the ___ blocks

Answer 4

sponges

building blocks

Question 5

current research suggests the animal nervous system evolved either ___ or ___

Answer 5

once or twice

Question 6

The animal nervous system enabled complex ___ like 3D burrowing paths. How do we know about this?

Answer 6

behavior

the fossil record has preserved the emergence of this complex behavior.

Question 7

sponges lack ___ ____ but make a number of ___ that are homologous to ones found in neurons

Answer 7

nervous systems

proteins

Question 8

simpleiseomorphy=