Define genotype and phenotype and describe how are they related

Number and variety of living organisms includes genetic, species, and ecological types

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance