How would you explain marine biology to a 5 year old?

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

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources

After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scientists to make sure that the data is real