Explanation: Homologous structures can be defined as the structures that are are similar in the structure but the function is different.
These organisms are related because they have show some common ancestor. Same structure performing different functions.
Example: The bones of whale and the and the bones of human have similar structure but their functions vary. The bones of whales function as fins and helps in swimming and the hands of human being is used for holding things.
From the example given in the question, it can be concluded that the forelimbs of the two animals are HOMOLOGOUS STRUCTURES. <span>Homologous structures refers to organs or skeletal elements of living organisms, that appear in different animals but are common in anatomical structures, which shows that the animals have a common ancestor. Homologous structures usually have similar anatomies but they are different in functions.</span>
Answer: Primary succession occurs after a volcanic eruption or earthquake; it involves the breakdown of rocks by lichens to create new, nutrient -rich soils. The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment.
