A controlled experiment is one that must

Which of the following is not one of the four basic characteristics of chordates? 

Regulation of genes can happen during?

What does a food web show that a food chain does not?  

What forms from the notochord?

There is a species of ant that lives on Acacia trees. Over time, the ants have evolved behaviors that protect the tree from being eaten by herbivores. The Acacia tree has evolved hollow thorns in which the ants can live and build nests. This is an example of

Which of the following is not a germ layer? 

Owls have a crop to help them store the bones and fur of their prey. 

You were hired by a local community college to inspect security vulnerabilities in a recently developed learning management system (web application). After carefully looking through all the source code on GitHub, you made a few observations. Match them with the top 10 vulnerabilities identified by the Open Web Application Security Protocol (OWASP). 

A researcher conducted an experiment with this hypothesis: Extra salt in the water affects the growth of coral. Which one of the following is a dependent variable?