My guess would be "B" cell wall
A dihybrid cross means that both parents are heterozygous (which is both expressing the dominant form) for two genes.
Answer:
Explanation:
Organisms have different forms of circulatory systems. Humans have a closed circulatory system, while many mollusks and other invertebrates have an open system. In a closed circulatory system, blood is enclosed within blood vessels.
E<span>ach atomic number identifies a specific element, but not the "Ion/Charged particle"
Hope this helps!</span>
