What do we mean by halogens

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present

Thyroid-stimulating hormone stimulates the thyroid gland to secrete sex hormones. true or false