Coral reefs are found in coastal ecosystems. Coral reefs have a high biodiversity. Which statement is true about coral reefs?

Which are forms of nitrogen that are usable by humans

There are six elements that make up most of the human body. which of the following is not one of these six elements?

You have 2 plants of the same type and same size, same amount of leaves. one of them is put inside the house and the other one is put in the balcony. you water them saturday, one plant with 200 ml and the other with 400 ml of water. which one of your plants need less water? explain.