What molecules do bears and humans have in common?

Humans and bears share a common ancestor that lived millions of years ago. As a result, they have a number of molecules in common, including:

* DNA: Humans and bears share about 98% of their DNA. This means that they have very similar genes, which code for the production of proteins.

* Proteins: Humans and bears produce many of the same proteins. These proteins perform a variety of functions in the body, such as building and repairing tissues, regulating metabolism, and transporting oxygen.

* Lipids: Humans and bears also share a number of lipids, which are fats and oils. Lipids are used for energy storage, insulation, and protection.

* Carbohydrates: Humans and bears both consume carbohydrates, which are sugars and starches. Carbohydrates are broken down into glucose, which is used for energy.

The similarities between humans and bears at the molecular level reflect their shared evolutionary history. They are both mammals, and they have evolved from a common ancestor over millions of years.