Which of the following substances is not a component of the osteoid material secreted by the cells indicated by the arrow in panel a?

collagen
glycoprotein
proteoglycan
calcium

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

Which image shows labeled organelles that are present only in plant cells?

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the