The kidneys, skin, and lungs are each a part of the system.

1. Respiratory
2. Excretory
3. Digestive
4. Nervous

The negative impacts of nonnative species generally outweigh the positive impacts

Anormal appearing couple is found to be heterozygous recessive for albinism both have the genotype aa the gene responsible for albinism is recessive to the normal pigment-producing gene what are the changes of their children being albino

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone