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A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles.
-If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the following structures, EXCEPT ________.

Question

Quizplus · Accepted Answer

The passage does not provide any information about whether the organisms have developed sex organs yet, so it cannot be determined if they would have them as larvae or not. However, the passage does mention that the organisms are able to crawl and swim, indicating that they would have an exoskeleton of chitin for support and protection, complex eyes for hunting and navigation, and antennae for sensory perception. Additionally, the passage does not mention anything about their circulatory system, so it cannot be concluded whether they have an open circulatory system or not as larvae.

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