Final answer:
Correct matches between descriptions of scientists' work and areas of biology are: Research with pathogens to 'Ecology and Evolution of Infectious Diseases', DNA and genes related work to 'Genomics and Molecular Biology', activities affecting climate to 'Global Ecology'.
Step-by-step explanation:
Biology is a vast field that encompasses the study of living organisms and their interactions with one another and the environment. The various descriptions of scientists' work provided in the question correspond to specific areas within biology, which we can match as follows:
- Research with HIV, bird flu, drug-resistant bacteria, and other pathogens relates to the field of 'c. Ecology and Evolution of Infectious Diseases'.
- Relating DNA and genes from a wide range of organisms to growth, development, aging, and disease falls under 'd. Genomics and Molecular Biology'.
- Investigating how the activities of all living organisms affect Earth's atmosphere and climate is part of 'a. Global Ecology'.
- Combining the latest genetic information with computer technology to organize all living things into a classification system pertains to 'b. Building the Tree of Life'.
These specializations reflect the diverse areas of study within biology, from the molecular level to the global ecosystem.