Answer:
The correct option is <em>B. Crossing- over </em>
Explanation:
In biology, crossing over can be described as a phenomenon by which homologous chromosomes exchange segments during the process of meiosis.
The unexpected results came because the DNA segment between the homologous chromosomes was exchanged during meiosis. The alleles got shuffled by this process and hence showed the unexpected results.
Crossing over and independent assortment are phenomenon which occurs only during the process of meiosis. These phenomenons cannot be observed during mitosis.
<span>Cells that are in multicellular organisms are suited to do specific jobs and work together to help the organism stay alive. Single celled organisms have to perform all the actions themselves in order to stay alive. :) </span>
Answer:
a. Produces antibodies in response to antigen exposure in the brain tissue
b. Found in the ventricles of the heart brain
c. Produces by te choriod plexus
d. Blocks blood toxins from brain tissue
e. Prevents concussions.
Explanation:
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