Rowan berries are generally considered non-poisonous for humans when consumed in small quantities. However, they can cause mild stomach upset or diarrhea if eaten in large amounts. It is important to note that some people may have allergies or sensitivities to certain compounds in rowan berries, so it is best to consume them in moderation. Additionally, rowan berries are toxic to some animals, so it is important to keep them away from pets. **

Yes, there are certain varieties of apples that contain toxic compounds in their seeds, such as cyanide. However, the amount of cyanide in apple seeds is typically very small and would need to be consumed in large quantities to be harmful. As for trees with poisonous apples, there are no known species of trees that naturally produce poisonous apples. **

Mealworms are not poisonous to humans. In fact, they are often used as a food source for birds, reptiles, and even some humans in certain cultures. However, it is important to ensure that mealworms are raised in a clean and safe environment if they are intended for human consumption. As with any food, it is important to ensure proper handling and preparation to avoid any potential health risks. **

Ants themselves are not poisonous, but some species of ants can deliver venom through their stings or bites. The venom can cause pain, swelling, and in some cases, allergic reactions in humans. However, the majority of ant species are not harmful to humans and their bites or stings are usually just irritating rather than dangerous. It's important to be cautious around ants and avoid disturbing their nests to prevent any potential stings or bites. **

No, broccoli is not poisonous. In fact, broccoli is a highly nutritious vegetable that is rich in vitamins, minerals, and antioxidants. It is safe to eat and is a popular choice for a healthy diet. However, like any food, it is important to wash and cook broccoli properly to ensure it is safe to consume. **

Firebugs, also known as Pyrrhocoris apterus, are not poisonous. They are harmless insects that feed on plant sap and do not pose any threat to humans or animals. While they may emit a foul-smelling odor when threatened, this is simply a defense mechanism and not a sign of toxicity. Therefore, firebugs are not considered to be poisonous. **

Yes, hemlock is highly poisonous. All parts of the hemlock plant, including the leaves, stems, and seeds, contain toxic alkaloids that can be fatal if ingested. Ingesting even a small amount of hemlock can cause symptoms such as nausea, vomiting, paralysis, and ultimately death. It is important to avoid contact with hemlock and to seek medical attention immediately if poisoning is suspected. **

Yes, some succulents can be poisonous if ingested. Many succulents contain toxic compounds that can cause gastrointestinal upset, skin irritation, or other adverse reactions if consumed by humans or pets. It's important to research the specific succulent species you have to understand any potential toxicity and take appropriate precautions to keep them out of reach of children and pets. If you suspect that someone has ingested a poisonous succulent, seek medical attention immediately. **