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. **

Heat-retaining materials are substances that have the ability to trap and hold heat for an extended period of time. These materials are often used in insulation to prevent heat loss in buildings or to keep objects warm. Common examples of heat-retaining materials include wool, fiberglass, and certain types of foam. By using these materials, energy consumption for heating can be reduced, making them environmentally friendly options. **

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. **

No, chanterelles are not poisonous. In fact, they are considered a choice edible mushroom and are highly sought after for their delicious flavor and meaty texture. However, it is important to properly identify chanterelles and be cautious when foraging for wild mushrooms, as there are poisonous look-alikes that can be harmful if consumed. It is always best to consult with an expert or guidebook before consuming any wild mushrooms. **

No, tarsiers are not poisonous. Tarsiers are small primates found in Southeast Asia, and they are known for their large eyes and unique hunting abilities. While they are not poisonous, they are skilled hunters and primarily feed on insects, small vertebrates, and birds. Their hunting prowess comes from their excellent night vision and ability to leap long distances to catch their prey. **

Totalgan is not poisonous. It is a medication used to treat certain types of cancer, and it works by slowing or stopping the growth of cancer cells. However, like all medications, Totalgan should be taken only as prescribed by a healthcare professional to avoid any potential adverse effects. If you have any concerns about the safety of Totalgan, it is best to consult with a healthcare provider. **

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. **