Answer:
1) Skull and Vertebral column
2) Meninges
3) Cerebrospinal fluid.
Explanation:
Central Nervous system:
CNS is the abbreviation of Central Nervous system. CNS controls the whole body functions so it is the most important component of the body. CNS consist of two parts 1) Brain and 2) Spinal cord
Both of these organs are very important and hence need to be protected. Nature provided these organs with certain protective mechanisms these includes
1) Skull and Vertebral column:
Skull is present around brain and vertebral column is present around spinal cord. These structure provides mechanical support to soft parts of CNS.
2) Meninges:
These are the membranes that provide antiseptic environment to the brain and hence protect it from microbes and other harmful substances.
3) Cerebrospinal fluid:
This fluid is present inside meninges which nourishes the brain and protect it from mechanical stresses.
Answer:
Brown eyes = 0.5
Blue eyes = 0.5
Explanation:
Given, B ( brown eyes ) is dominant over b ( blue/light eyes ). So,
BB = Brown
Bb = Brown
bb = blue/light
Mr. O'Ryan = blue eyes = bb
Mrs. O'Ryan = heterozygous brown eyes = Bb
Their children: Bb X bb :
B b
b Bb bb
b Bb bb
Half of the children will have Bb genotype and brown eyes, other half will have bb genotype and blue eyes. Hence, Kellan O'Ryan has 0.5 probability of blue eyes and 0.5 probability of brown eyes.
Phospholipids, Steroids, and Triglycerides.
