demography
changes in genes within and among populations
so basically they can survive and adapt to their environment.
A deer trail
The biosphere part surrounding organisms is the environment. They have complete interaction and formation within the environment which results to the study of ecology.
Epidemiology is the study of factors affecting the health and illness of populations. The specialist is called an epidemiologist.
populations
Variations within populations is what natural selection is " looking " for. That one variant of a population is somewhat better able to survive and reproduce than other variants against the backdrop of the immediate environment is natural selection.
Food availability, (type of food available for the hummingbird)
genetic changes within and among populations
Sociology has many important aspects. It allows for the study of people, society, populations, cultures, and social norms within certain groups.
Sociology has many important aspects. It allows for the study of people, society, populations, cultures, and social norms within certain groups.
Organisms are not isolated in their environment. Organisms must interact with other individuals of their own species, with other species, and with their physical environment. The study of the interactions between organisms and their environment is called ecology (Greek: oikos- house; logia- study). The study of ecology can encompass all aspects of Biology; from physiology to behavior, because any change within an organism has the potential to affect its relationship with the environment.