Which of the following observed chimpanzee behaviors caused scientists to reevaluate what it meant to be human? a. kissing b. holding hands c. tool making d. speaking

The diagram illustrates the activity of vesicles during a cellular process.

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

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