If two organisms are in the same clade, what can you predict about their relationship? . . a. they are not closely related. .b. they share a common ancestor.. c. they compete for resources.. d. one organism evolved into the other organism.

If two organisms are present in the same clade, then it predicts that they have evolved from a common ancestor.

Further Explanation:

A clade is a set of organisms that include all the common ancestors with their descendants. In the case of small clades, there can be a probability that the same character condition repeatedly evolved under similar environmental pressures. Cladistics is a process of classifying organisms based on their shared traits. The homoplasy (characters absent in the common ancestors but is shared among each member of the group) and homology (characters having the same ancestral origin) can be explained by phylogenetic analysis.

There is a possibility that the members of each group possess the characters that are derived by convergent evolution from their common ancestors. These characters have been changed through the course of evolution. The most parsimonious explanation for the grouping of organisms depends upon their recent common ancestry. Thus, two organisms present in a single clade shows that they have mainly evolved from a common ancestor.

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Answer Details:

Grade: High School

Subject: Biology

Chapter: Evolution

Keywords:

Cladistics, clade, phylogenetic analysis, parsimonious, common, homoplasy, character, group, ancestors, homology, evolved, members, probability.

The correct answer is B. They share a common ancestor.

A clade may be defined as a group of organisms which consists of a single ancestor and all its descendants. A clade can be recognized easily by studying their evolutionary relationship tree. Continuous lines of evolutionary descent is a clade.  The direct descent from an ancestor on the branch of an evolutionary relationship tree forms a clade.

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