All chordate embryos have a tail that is described asMultiple choice question.preanal.postanal.anterior.

Break Down the Problem

1. Identify the characteristics of chordate embryos.
2. Determine the correct terminology used to describe the tail in relation to the body.

Relevant Concepts

• Chordates are characterized by having a notochord, dorsal nerve cord, pharyngeal slits, and a tail at some stage of development.
• The tail in chordate embryos is located behind the anus; thus, the appropriate term often used in biological terminology is "postanal."

Analysis and Detail

1. Chordate embryos possess a tail that extends beyond their anal region.
2. Unlike other types of tails that might refer to the position relative to other anatomical features, in chordates, this tail is described specifically as "postanal" because it develops behind the anal opening.

Verify and Summarize

Given that the tail of chordate embryos is located posterior to the anus, the term "postanal" accurately describes its position.

Final Answer

The correct answer is postanal.