Starting in on Unit D – Biodiversity (Classification of Life)
Here is the on-line version of the reference reading. Doing Section 19.1 Today – Finding Order in Diversity
And you have a Unit D – Biodiversity Study Guide to focus your thoughts.
Learning how to use a Dichotomous Key; Assignment D-1
A few Playlist Videos may be helpful after you do the reading; the first first videos for 20 minutes.