1.2 describe cell structures including the nucleus, cytoplasm, cell membrane, cell wall, chloroplast and vacuole.

Organelle: a structure or part of a cell that serves a particular function

Descriptions of organelles:

- Nucleus: generally the largest organelle. 

   contains genetic information in chromosomes needed for cell division/ genes.

- Cell membrane: a thin outer protective layer that covers the cell

- Cytoplasm: a jelly-like substance that fills the cell

- Vacuole: a watery solution full of sugars, minerals and other solubles

- Chloroplast: tiny sacs that contain the green pigment chlorophyll which absorbs sunlight and is needed for      photosynthesis

- Cell wall: extra layer made of cellulose, a tough polysaccharide that plants produce
                 large holes in it - freely permeable
                 tough rigid material

- Mitochondria: tiny structures that are found in the cytoplasm.