Which properties of protists make it difficult to group them in any other group?

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

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome