Design a molecular manipulation that would instruct neuroepithelial progenitors in the dorsal neural tube to adopt a ventral fate. how about one that leads to the transformation of the fifth digit into the morphology of the first digit? be sure to clearly describe the molecule your manipulation will target, whether you reduce or increase the molecule’s function, and the anatomical location of its action in your answer.

9. wind power creates pollution. water air soil noise

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?