An indicator species is an organism whose presence, absence or abundance reflects a specific environmental condition. Indicator species can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem.
Answer:
A. Filtering Blood to Remove Unwanted Waste
Explanation:
Excretory system is comprised of Kidneys, liver, lungs and skin.
Answer:
1. bad mental things, sadness and other mood swings , and not talking to anyone.
2. Cultural, religious, or personal beliefs that discourage su!c!de and life skills (including problem solving skills and coping skills, ability to adapt to change)
Answer:
bc it can be a baby and that baby does not know anything
Explanation:
