Adult Sea Squirts lack all four of the chordate characteristics EXCEPT: a. pharyngeal slits. c. a notochord.
b. hollow nerve cord. d. tail.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.