that they give birth to live young, or are there answers to choose from?
Cancer cells have abnormal nuclei
Answer:
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Crossing over creates new combinations of genes in the gametes that are not found in either parent adding to genetic diversity
Answer:
Spikes are found on some viruses. They are very consistent in structure and can be used for identification.
Explanation:
Viruses have varied structures. A virus particle is composed of DNA or RNA that is inside a protective layer of protein called a capsid. The shape of the capsid can vary from one type of virus to another. The capsid is composed of proteins that are encoded by viral genes within the virus genome.