Question

evidence notebook directions: please answer both parts of the question below. you must provide evidence and reasoning to support your answer citing the hmh textbook (i.e. not using google or other search engines, as doing so will result in no credit). prompt: how would you describe the relationship between the hornworm caterpillar and the tomato plant? do they have a symbiotic relationship, and if so, what is the name for this relationship? explain your answer (why you chose what you chose) using your best reasoning and specific vocabulary from your textbook.

Explanation:

1. Relationship Description: The hornworm caterpillar (Manduca species) feeds on the leaves, stems, and fruits of the tomato plant. This means the caterpillar derives nutrition (food) from the tomato plant.
2. Symbiotic Relationship Analysis: Symbiotic relationships include mutualism (both benefit), commensalism (one benefits, one is unaffected), and parasitism (one benefits, one is harmed). The hornworm caterpillar benefits by getting food, while the tomato plant is harmed as its tissues are damaged, reducing its ability to photosynthesize, grow, or reproduce. According to the HMH textbook (in sections on ecological interactions or symbiosis), this is a parasitic relationship (specifically herbivory, a type of parasitism where the parasite is an herbivore and the host is a plant). Herbivory is when an animal feeds on a plant, and the plant is negatively affected (loses biomass, energy, or reproductive potential), while the herbivore gains energy and nutrients.
3. Naming the Relationship: Since the caterpillar benefits at the expense of the tomato plant (the plant is harmed), their symbiotic relationship is parasitism (with the more specific type being herbivory, as the host is a plant and the parasite is an herbivorous animal).

Answer:

• Relationship: The hornworm caterpillar feeds on the tomato plant, consuming its tissues (leaves, stems, fruits) for nutrition.
• Symbiotic Relationship: Yes, they have a symbiotic relationship of parasitism (herbivory). In this relationship, the hornworm caterpillar (parasite/herbivore) benefits by obtaining food/energy, while the tomato plant (host) is harmed (loses biomass, reduced photosynthesis/reproduction) because the caterpillar damages its tissues. This fits parasitism (a symbiotic relationship where one organism benefits and the other is harmed) as defined in the HMH textbook’s coverage of ecological interactions, with herbivory being the plant - herbivore subset of parasitism.