The process by which organisms maintain a relatively stable internal environment.

• homeostasis

• balance

• zen

• keepin' it 100

A jellylike fluid inside the cell in which the organelles are suspended

• cell membrane

• cytoplasm

• cell wall

• cytoskeleton

Organelle that makes proteins

• cell membrane

• cytoplasm

• ribosomes

• nucleus

A cell structure that controls which substances can enter or leave the cell.

• cell membrane

• cytoplasm

• cell wall

• ribosomes

Structure that contains the cell's genetic material in the form of DNA.

• Ribosomes

• endoplasmic reticulum

• mitochondria

• nucleus

Site of protein and lipid synthesis.

• Ribosomes

• mitochondria

• endoplasmic reticulum

• cell wall

A system of membranes that modifies and packages proteins for export by the cell.

• Endoplasmic reticulum

• golgi apparatus

• ribosomes

• mitochondria

Powerhouse of the cell; energy is produced or processed here.

• mitochondria

• nucleus

• endoplasmic reticulum

• cell membrane

An organelle found in plant and algae cells where photosynthesis occurs.

• Chloroplast

• mitochondria

• ribosomes

• golgi apparatus

A rigid layer of nonliving material that surrounds the cells of plants and some other organisms.

• cell membrane

• cell wall