Answer the following: These animals are engaged in

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Image Description for Educational Website:**

The image features two marine flatworms, which are visible against a backdrop of coarse sand or coral fragments. The flatworms are a translucent, purplish color and have ruffled edges.

**Photo Credit:**
Nico Michiels, available under a Creative Commons license: [CC BY 2.5](https://creativecommons.org/licenses/by/2.5/deed.en). Reference: Whitfield J: PLoS Biol 2/6/2004: e183.

**Question:**
These animals are engaged in __________________________. 

(Note: The correct answer to fill in the blank may be "mating behavior" or "flatworm mating," which often involves unique behaviors such as "penis fencing.")
Transcribed Image Text:**Image Description for Educational Website:** The image features two marine flatworms, which are visible against a backdrop of coarse sand or coral fragments. The flatworms are a translucent, purplish color and have ruffled edges. **Photo Credit:** Nico Michiels, available under a Creative Commons license: [CC BY 2.5](https://creativecommons.org/licenses/by/2.5/deed.en). Reference: Whitfield J: PLoS Biol 2/6/2004: e183. **Question:** These animals are engaged in __________________________. (Note: The correct answer to fill in the blank may be "mating behavior" or "flatworm mating," which often involves unique behaviors such as "penis fencing.")
Expert Solution
Step 1

Platyhelminthes are flatworms having many classes of triploblastic and are acoelomate flatworms that lack a true gut, i.e., their gut is incomplete. The organisms shown in the image are Pseudobiceros bedfordi which are commonly known as the Persian carpet flatworm. These organisms are found in shallow marine habitats such as reefs. Their bodies are very thin elongated for oval-shaped. These organisms are hermaphrodites, because of which went two individuals are these species find each other, they get engaged in an event known as "penis fence" or "sperm battle" with the help of their double-prong penis stylet and try to inseminate the each other by piercing each other's skin as insemination can occur through any part of the organism's skin.

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