AP BIOLOGY

Detailed explanation-1: -If two or more species share a unique physical feature, such as a complex bone structure or a body plan, they may all have inherited this feature from a common ancestor. Physical features shared due to evolutionary history (a common ancestor) are said to be homologous.

Detailed explanation-2: -Common ancestor: When two organisms came from the differentiation of the same ancestor, this ancestor is referred to as a common ancestor between the species. Common descent: A characteristic in multiple species that was first exhibited by another ancestor of a different species.

Detailed explanation-3: -All true animals-members of the kingdom Animalia-are eukaryotic multicellular organisms that share a single common evolutionary ancestor (Fig. 3.4). This last common ancestor was likely a single-celled organism similar to modern day choanoflagellates.

Detailed explanation-4: -common ancestor: The most recent ancestral form or species from which two different species evolved. comparative biology: The study of patterns among more than one species.

Detailed explanation-5: -The concept of common ancestry stems from evolutionary biology. It can be defined as one specifies being the ancestor of two or more species in the later period. Homology is a connection that shows descent from a common ancestor by defining a relationship between structures or DNA generated from a common ancestor.