Answer:The first one
Explanation:Parasites increase in the host's body because they need to reproduce, causing the number of parasites to increase
Homo ergasrer lived in Africa 1.6 million years ago
1, 2 and 3. Common knowledge needs to have a reference of where you learnt it.
Answer:
What is d. anti-B; A
Explanation:
A person with type A blood has Anti-B antibodies circulating through his or her plasma and produces A antigens on the cell surface.
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