A cladogram is shown for three groups of organisms, X, Y, and Z.

Which relationship is the arrow pointing to in the cladogram?

the common ancestor for X and Z
the common ancestor for X and Y
the common ancestor for X, Y, and Z
the common ancestor for Y and Z

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

Aperson travels 35 km in 0.4hrs, followed by 53 km in 0.6 hr. what is the average speed

Can someone i have no idea of how to do this.