Which transport protein employs transporters that move molecules only in one direction?

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

Study this image which statement best describes the rock shown check all that apply

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.