'Christmas' and 'other' are the only two categories of trees in my head.
Recognizing that students struggle to read traits from a phylogenetic tree, deduce ancestral traits, and reconstruct phylogenetic trees (Meir et al., 2007; Perry et al., 2008), our incremental approach addressed three categories of tree-thinking skills: interpreting relationships within trees, comparing among trees, and constructing trees.
We followed the classification of Morand-Prieur [ 30], who also observed three additional categories of trees (three types of females) that we did not observe here.
One category of trees has at least escaped ministerial censure: the planes and poplars that for centuries have been planted along the towpaths of canals.
Riparian vegetation was found to be the most stable category of trees outside forest.
A special category of trees, due to the biological interest in displaying and studying evolutionary relationships among species, are the so called phylogenetic trees.
Our results show distinct variability in the distribution of aspect ratios between the four categories of grasses, tree leaves, wood, and other materials (Fig. 7).
The dbh category of a tree was redefined at every census, meaning trees changed categories if they grew enough, and trees entering the census for the first time were always included.
Fifty-four of these genes are included in at least one of the overrepresented categories of the Gene Ontology tree.
By better understanding how students make sense of biological representations, particularly phylogenetic trees, I have identified two unique categories of skills, one for tree-thinking related to tree reading and the other for tree building development.
