Question

evolution nova virtual reading & making cladogram lab training trees
directions: use the following site and directions below to complete the assignment. a link can also be found in clever and canvas.
site http://www.pbs.org/wgbh/nova/lab/lab/evolution/
after the video click on the yellow button, that says play game. click on guest pass. this will take you to the game. click play to start mission 1
mission 1: training trees: in these activities, youll need to read the information about each species by clicking on the magnifying glass. then you will move the species into a tree with the correct branches and match the characteristics to the correct branches. above the species will be little lights that will glow the colors of the correct characteristics. if a color is incorrect, the light will bounce out when it reaches the species. youll get them all correct if each of the species have all their lights lit.
video questions:

1. each branch on a cladogram or \tree\ represents:
2. places where 2 or more branches meet represents a:
3. define / explain speciation
4. on the cladogram more ancient species are located while more modern species are located at the

Explanation:

1. Cladogram branches represent evolutionary changes or traits that emerge in a lineage, distinguishing a group from its ancestors.
2. The junction point of multiple cladogram branches is a common ancestor (node) shared by all the lineages that branch off from it.
3. Speciation is the evolutionary process where a single population splits into two or more distinct, reproductively isolated species that can no longer interbreed to produce viable offspring.
4. Cladograms are structured with the most ancient (basal) species at the base/root of the tree, while more modern, derived species are positioned at the tips of the branches.

Answer:

1. a unique evolutionary trait or a new lineage (the point where a new trait evolves and a group diverges)
2. node (common ancestor of the branching lineages)
3. Speciation is the evolutionary process by which a single ancestral population splits into two or more distinct, reproductively isolated species that cannot produce fertile offspring with one another.
4. at the base/root of the cladogram; tips of the branches