One tree needs 5 edits and its rival needs 8. How many does the winner need?
Answer: ______________
Which trait carries shared blood information?
- Wing shapes of fliers and crawlers
- Forelimb bones of mammals
- Sweetness of every candy
The tree with the fewest required changes wins.
Circle one: True False
What makes a group complete and valid?
- An ancestor with some kids cut out
- A random pile of species
- An ancestor plus all its kids
A trait sits in every species studied. What is its grouping power?
- It cannot define a group
- It defines the tightest group
- It doubles the evidence
A friend groups mammals by backbones. Is that sound?
- Yes, backbones mark mammals
- No, far more than mammals own one
- Yes, old traits group best
A friend groups birds with bugs by wings. Is that right?
- Yes, looks never lie
- Yes, function proves blood
- No, they evolved apart despite looking alike
Every candy in the jar is sweet. What does sweetness group?
- Nothing, it groups no one
- It marks the tightest team
- It roots the whole tree
Crown the tree with fewest edits W1-mt_GFmiVZ8g-F-s1
- 5 · The smaller tally wins, so five edits beats eight and the winner needs five.
- Forelimb bones of mammals · Mammal forelimbs share build from shared blood, while flier wings arose apart.
- True · Each extra origin is an extra unobserved event, so fewer is better.
- An ancestor plus all its kids · Valid groups are complete: nothing left out and nothing extra added.
- It cannot define a group · Old states fit any subgrouping, so only fresh shared states mark true subgroups.
- No, far more than mammals own one · Hair is fresh at that level, while backbones spread far wider.
- No, they evolved apart despite looking alike · Flier wings in birds and bugs are the classic apart by looks trap.
- Nothing, it groups no one · A trait in every piece mirrors old shared states: consistent with everything, proving nothing.