PLEASE HELP All living reptiles are warm-blooded.
a. true
b. false
17
Alligators are reptiles whose bodies are enclosed in a shell.
a. true
b. false
18
Birds are egg-laying vertebrates that have feathers.
a. true
b. false
19
Nightingales, cardinals, and canaries are examples of waterfowl.
a. true
b. false
20
Reptiles breathe through their skin.
a. true
b. false

1). False

2).True

3). False

4). False

5). False

Explanation:

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

climate change and pollution