What is the major cause of changes in gene expression?

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

What is a limitation of using a chemical formula, such as c6h1206, to represent a compound? the chemical formula does not show the types of elements that make up the compound. the chemical formula does not show how the atoms are connected to one another the chemical formula does not show the number of atoms of each element in a molecule. the chemical formula does not show the chemical symbols of the elements in the compound