The phylogenetic tree below represents the classification of species x, y, and z. Assuming this classification reflects evolutionary relatedness, explain how these species are related to each other.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

i think that d. wind is the answer.   i missed the question when i answered a. currents.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

the answer is c. it will give up it's valence electron to the other atom.