Explanation:
Many invertebrate animals cant survive in water that has been polluted and resulted in a lowering of oxygen concentration so the presence or absence indicates the extent to which a body of water is polluted.
Lichens can be used to indicate air pollution as they grow exposed to places such us rocks and tree barks. They need to be efficient at absorbing water and nutrients to grow there. Rain water contains enough nutrients to keep them alive. Air pollutants dissolve in rain water especially sulfur dioxide can damage lichens and prevent them from growing. This makes them a natural indicator of air pollution.
Answer:
milk is present in the digestive system, which turns on the gene for lactase.
Explanation:
Answer:
i see this was posted 3 days ago, do you still need help with this question?
Explanation:
A because a hypothesis takes a form of statement in a "If ______, Then _____." typically. so A should be your answer
