Answer:
4.54 billon years
Explanation:
the earliest time that life forms first appeared on Earth is at least 3.77 billion years ago possibly as early as 4.28 billion years
Kelly, who is blind, switches on the fan in her room without anyone's help. she is able to do this because the Somatic nervous system relays the relevant information to her brain.
<h3>
Nervous system :</h3>
According to the classical doctrine of the nervous system, an animal's nervous system is a highly sophisticated component that coordinates its movements and sensory data by sending and receiving signals to and from various regions of its body.
<h3>
Somatic nervous system :</h3>
The somatic nervous system, also known as the voluntary nervous system, is the area of the peripheral nervous system responsible for the voluntary control of skeletal muscle movement.
A part of the peripheral nervous system called the somatic nervous system is responsible for the voluntary control of skeletal muscle movement.
<h3>Example somatic nervous system</h3>
The cranial nerves, which transmit information from the brain to the head and neck region, are an illustration of the somatic nervous system. In this area, conscious motor functions are under the control of the somatic nervous system.
To know more about cranial nerves visit :
brainly.com/question/14084468
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Answer:
B
Explanation:
The cell membrane is like a gate around the cell, it only lets certain substances come in and out of the cell.
It's know as chemical equilibrium
