Question

1. which structure is the layer of cells that lines the gastrovascular cavity? (1 point)

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1. which structure is the site of ingestion and egestion?

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Explanation:

1. In cnidarians and other organisms with a gastrovascular cavity, the gastrodermis is the inner layer of cells that forms the lining of this cavity, responsible for digestion and nutrient absorption.
2. The mouth/opening of organisms like cnidarians (e.g., jellyfish, hydra) serves as both the site where food is taken in (ingestion) and where undigested waste is expelled (egestion), as they lack a separate anus.

Answer:

1. Gastrodermis
2. Mouth (or oral opening)