Final answer:
The true of all eukaryotic organisms is D. They have nuclei in their cells.
Step-by-step explanation:
Eukaryotic organisms are characterized by having a nucleus in their cells. This includes animals, plants, and fungi. A nucleus is a membrane-bound organelle that houses the DNA of the organism.
Eukaryotic organisms reproduce both asexually and sexually. Asexual reproduction involves the production of offspring that are genetically identical to the parent. Examples of asexual reproduction in eukaryotes include budding in yeast and binary fission in certain protists. Sexual reproduction involves the fusion of gametes, resulting in genetically unique offspring. Examples of sexual reproduction in eukaryotes include the mating of animals and the fertilization of plants.
Therefore, the correct answer is D. They have nuclei in their cells.