Answer:
The brain and the spinal cord are wrapped in three protective layers of tissue called the meninges. The cerebral spinal fluid goes between these layers to provide more cushion and protection. It nourishes and protects the nerve tissues of the brain and spinal cord. It also acts as a shock absorber, considering humans move a lot and fall.
May be single-celled or multi-celled
have cells that contain DNA within a nucleus
include animals and plants
A.Zygomatics doesn't belong with the list of organelles
Answer:
Explanation:
Consider the small sphere radius is x1.
therefore the large sphere radius is 3x1
As we know that volume of sphere=
So ,
Volume of the small sphere
=
also Volume of the large sphere
=
On solving the equation
volume of large sphere=27 * volume of small sphere
Hence