<h2>Answer:</h2>
Bella is writing a research paper on ocean currents. The two sources she should consult will be;
1. an article published by a university or a government agency
3. an article published in 2015 and updated a week ago
Because while writing research papers we should consult authentic and latest information and resources.
Answer:
because different cell types can perform different functions
B-cells fight bacteria and viruses by making Y-shaped proteins called antibodies, which are specific to each pathogen and are able to lock onto the surface of an invading cell and mark it for destruction by other immune cells
