The study of human populations is called Demography. Sorry it’s late.
Proxima Centauri is the nearest star to Earth.
Because it codes for specific proteins and contains the genetic instructions needed in order for an organism to survive, develop and reproduce
Answer:
The biologist is studying about the ecological community.
Explanation:
The ecological community refers to the community in which population of different types of species survives together. As the biologist is observing about the interaction of different populations of Pennsylvania region, it can be inferred that the he is studying about the ecological community of Pennsylvania region.
The population surving in the community interact with each other through different modes of interaction. It may either parasitic, or mutual, or competitive or predication or commercialism.
