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.
Answer:
holozoic , saprophytic , parasitic
Answer:
Ecology is the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
The glacial budget refers to the input of water to the output of water. The input is when people put water in the glacier and the output is when the glacier starts to evaporate.
