Question

sparrows are birds that were introduced in the mid 1800s to North America. It is known that sparrows from the north are larger and darker and sparrows from the south are smaller and weigh less. Scientists believe that this is due to differences in weather in these two regions. This is an example of a) microevolution b) macroevolution c) migration d) mutation e) mutualism

Answer 1

Microevolution

Step-by-step explanation:

Microevolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed macroevolution.

Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.

Microevolution may lead to speciation, which provides the raw material for macroevolution.

Answer 2

Answer:microevolution

Step-by-step explanation: