I was reading a paper about using blood from animals like horseshoe crabs because of the high amounts of copper that is the oxidizing agent. What animals have blood that uses metals other than iron and does it affect any other systems in their body?
How do different plant species have different temperature, sunlight, nutrient, and water needs? What plant biological factors determine these needs?
How do air plants survive without soil or how do cacti go months without water?
What are other examples of plants with weird needs?