No it doesn’t not need to fully cross it just needs to cross the plain
Answer:
the answer is true
Explanation:
I looked up the definition and B cells are activated and they proliferate to produce antibody become cells that produce antibodies for that antigen .
Answer:
Um testes release sperm and ovaries release eggs
Answer:
The organic molecules required for building cellular material and tissues must come from food. Carbohydrates or sugars are the primary source of organic carbons in the animal body. The carbon and nitrogen derived from these become the building block for nucleotides, nucleic acids, proteins, cells, and tissues.
