Answer:
the heart
Explanation:
the heart is a muscular organ in the center of you chest that contract about 60-80times
Answer:
The skull.
Explanation:
The cerebrospinal fluid is a clear fluid that serves as a nutrient delivey system for the brain, it also removes waste and acts as a cushion surrounding the brain and spinal cord. <em>Its leakage from the nose usually happens when there is a fistula between the dura and the skull base after a trauma.</em> This kind of fractures can lead to meningitis and surgery is needed.
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The second trimester is when the respiratory system is mature.
Answer:
1/2
Explanation:
Father: is a heterozygote for this trait
. Meiosis: 1/2 is the frequency for the normal allele
Mother: has two recessive alleles (i.e., doesn't have the trait). Meiosis: 2/2 is the frequency for the normal allele
In consequence, the probability of having polydactyly is: (1/2) x (2/2): 1/2
Bone, which is made of collagen, which is strenghtened by calcium phosphate