QUESTION 20 ) "Crossing Over" is A. The process of separating the chromosomes in Mitosis and Meiosis B. The exchanging of genetic material on the chromosomes in Meiosis
C. The process of DNA replication
D. All of the above are correct​

Chromosomal crossover

Crossing over is the swapping of genetic material that occurs in the germ line. During the formation of egg and sperm cells, also known as meiosis, paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross over one another.

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b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.