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Which statement about animals is true? Question 14 options: All members of the animal kingdom have coelom. All members of the animal kingdom are composed of only two cell layers. All members of the animal kingdom are heterotrophic. All members of the animal kingdom use sexual reproduction only.

Question

Which statement about animals is true?

Question 14 options:

All members of the animal kingdom have coelom.

All members of the animal kingdom are composed of only two cell layers.

All members of the animal kingdom are heterotrophic.

All members of the animal kingdom use sexual reproduction only.

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Solution

Sure, let's analyze each statement step by step to determine which one is true about animals.

  1. All members of the animal kingdom have a coelom.

    • A coelom is a body cavity that is completely lined by tissue derived from mesoderm. However, not all animals have a coelom. For example, flatworms (Platyhelminthes) are acoelomates, meaning they lack a coelom. Therefore, this statement is false.
  2. All members of the animal kingdom are composed of only two cell layers.

    • Animals can have different levels of tissue organization. Diploblastic animals, like cnidarians (jellyfish, corals), have two cell layers (ectoderm and endoderm). However, most animals are triploblastic, meaning they have three cell layers (ectoderm, mesoderm, and endoderm). Therefore, this statement is false.
  3. All members of the animal kingdom are heterotrophic.

    • Heterotrophic organisms obtain their food by consuming other organisms. All animals are heterotrophic because they cannot produce their own food through photosynthesis or chemosynthesis. Therefore, this statement is true.
  4. All members of the animal kingdom use sexual reproduction only.

    • While many animals reproduce sexually, there are also many that can reproduce asexually. For example, some species of starfish, sponges, and certain insects can reproduce asexually. Therefore, this statement is false.

Based on the analysis, the true statement about animals is:

All members of the animal kingdom are heterotrophic.

This problem has been solved

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