At about 12 to 16 years old
Answer:
homology.
Explanation:
These similarities in structural are an example of homology because human arms, bat wings, and dolphin flippers are different organisms that have the common ancestor. The similar bone structure of different organisms and different its function is due to common ancestor. Homology similarity of the structure and physiology of different species of organisms due to their descent from a common evolutionary ancestor so we can say that these structural similarities are an example of homology.
Answer: Option B) individuals moving from one region of the country to another region of the same country.
Explanation:
All the other options affect the size of population in that:
- increased death rate
It reduces the total number of individuals living at a point in time
- individuals moving from this country to another country i.e Emigration
Of course, the total number of individuals reduces as some move out of a country
- increased birth rate
This raises the total number of individuals living at a point in time.
On the other hand, the distribution of individuals in a population is affected by the movement from one region of the country to another region of the same country. For instance: the movement from rural areas to urban areas affects only the distribution of people not the size of the population.