Which of the following describes a relationship of commensalism?
oxpecker birds eat parasitic ticks off the backs of zebras
a tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat
a polar bear catches a seal for dinner
birds feed off the insects that are stirred up from the grasses as cattle move through

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student:

Moving down the ramp from 6 meters to