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Curated Video
Fossils and Geographical Evidence
This video outlines how fossils are evidence of geographical phases.
Professor Dave Explains
B Cells and Antibodies (Humoral Immunity)
With T cells thoroughly covered, let's move on to B cells and antibodies, which are the central elements of humoral immunity. How do B cells develop? What are antibodies, how many kinds are there, and what do they do? Let's get a quick...
Sophia Learning
Sophia: History of Type: Lesson 2
In this lesson you will learn to categorize type families by historical classification. It is 2 of 3 in the series titled "History of Type."