In biology, the endoplasmic reticulum (ER) is a continuous membrane system that forms a series of flattened sacs within the eukaryotic cell, cytoplasm and serves multiple functions, especially in protein synthesis, folding, modification and transporting proteins. An endoplasmic reticulum (ER) retains all eukaryotic cells.
Through the use of The Endangered Species Act (1973). Alsom national parks are federal, not state land; therefore, the national government can control them.
