which two characteristics do all animals have?\nthey are symmetrical and heterotrophic.\nthey are…

which two characteristics do all animals have?\nthey are symmetrical and heterotrophic.\nthey are heterotrophs and have a backbone.\ntheir cells have a nucleus and membrane - bound organelles.\nthey have a backbone, and their cells have membrane - bound organelles.

which two characteristics do all animals have?\nthey are symmetrical and heterotrophic.\nthey are heterotrophs and have a backbone.\ntheir cells have a nucleus and membrane - bound organelles.\nthey have a backbone, and their cells have membrane - bound organelles.

Answer

Brief Explanations:

  • Option 1: Some animals like sponges are asymmetrical, so this is incorrect.
  • Option 2: Many animals (invertebrates) do not have a backbone, so this is incorrect.
  • Option 3: All animals are eukaryotes. Eukaryotic cells have a nucleus and membrane - bound organelles. This is correct.
  • Option 4: As mentioned before, many animals lack a backbone, so this is incorrect.

Answer:

Their cells have a nucleus and membrane - bound organelles.