In living things, smaller substances are linked to make up larger substances. Which of the following correctly describes a larger substance made by linking smaller substances?

How can you keep track of variables in a science experiment?

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to