1.  A ribosome eith several subunits

2.  Ribosomes attached to each other in linear arrangements

4.   Many ribosomes attached to strand of endoplasmic reticulum

1.  Lacks membrane and consists air

2.  Lacks membrane and contains water and excretory substances

3.  Is membrane bound and contains storage proteins and lipids

1.  Peroxisomes

3.  Mitochondria

4.  Proplastids

1.  Bacteria

3.  Diatoms

4.  Virus

1.  Root hair cell

2.  Stem hair cell

3.  Bacterial cell

2.  Chloroplast

3.  Chromoplast

4.  Centriole

1.  Mitochondria

3.  Glyoxysome

4.  Lysosome

2.  55 A

3.  35 A

4.  20 A

2.  Nucleus

3.  Chloroplast

4.  Mitochondria

1.  Mitochondria

3.  Ribosome

4.  Chloroplast