1. Tardigrade
  2. Question
  3. Biology
  4. Statement I: All sponges are marine and have choanocytes. Statement II: All mammals are viviparous and possess diaphragm for breathing

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Q. Statement I: All sponges are marine and have choanocytes.
Statement II: All mammals are viviparous and possess diaphragm for breathing

Animal Kingdom

Solution:

Most sponges are marine but few are present in fresh water (e.g., Spongilla) have water transport or canal system. Choanocytes are cells lining the spongocoel and canals.
Usually mammals are viviparous with few exceptions e.g., Omithorhynchus