The answer is Hox Genes. Just took the exam.
Answer:
Infectious diseases are diseases caused by living organisms like viruses and bacteria. They can be passed from person to person through body secretions, insects or other means. Examples are SARS, influenza, the common cold, tuberculosis (TB), Hepatitis A and B.
While scientists study how nature works, engineers create new things, such as products, websites, environments, and experiences. Because engineers and scientists have different objectives, they follow different processes in their work. Scientists perform experiments using the scientific method<span>; whereas, engineers follow the creativity-based </span>engineering design process<span>.(I hope this helps)
</span>
Chemical energy.
Hope this will be the answer.
