Answer:
Stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release
Explanation:
Answer:
*Every student may not have access to internet.
*Learning on gadgets may distract the mind .
*It is not effective way to teach.Everyone may not have good environment for learning.
The mutation will become more common in offspring and increase the genetic variability in the gene pool.
Circulatory System because it carries the blood throughout the body.