Which of the following do a frog, worm, and pine tree have in common?

• A. They are all composed of eukaryotic cells.
• B. They all have a backbone.
• C. They all perform photosynthesis.
• D. They all reproduce by seeds.

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by identifying the key characteristics of eukaryotic cells. Eukaryotic cells have a nucleus enclosed by a membrane, organelles such as mitochondria, and are found in animals, plants, fungi, and protists.
2. Step 2: Analyze the organisms mentioned in the problem: frogs, worms, and pine trees. Frogs are animals, worms are animals, and pine trees are plants. All of these organisms are composed of eukaryotic cells.
3. Step 3: Evaluate the statement 'They all have a backbone.' Frogs are vertebrates and have a backbone, but worms are invertebrates and lack a backbone. Pine trees, being plants, do not have a backbone either.
4. Step 4: Assess the statement 'They all perform photosynthesis.' Pine trees, as plants, perform photosynthesis. However, frogs and worms are animals and do not perform photosynthesis.
5. Step 5: Examine the statement 'They all reproduce by seeds.' Pine trees reproduce by seeds, but frogs reproduce sexually through eggs, and worms reproduce sexually or asexually depending on the species. Therefore, this statement is not true for all three organisms.