Autonomic nervous system:
-heart beats
-stomach digest
-produce bile
-feel a hot pain
-release adrenaline
-diaphragm relaxes
-colon contracts
-pancreas secretes
...............
somatic nervous system:
-make peace sign
-climb stairs
-curl tongue
-fingers curl
-point toes
-stretch arm
-fist clenches.
Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: ... We show how the world population grew over the last several thousand years and we explain what has been driving this change.
Explanation: BRAINLY Sometimes don't give u the right answer....SO TRUST ME ON THIS ONE <3 u should get a A++++
Because humans are more functional than animals
I believe the answer is Photosythesis. -Bio 1