Naphthaleneacetic Acid

Narcissus

                    DIAGRAM:  

                          PHOTO: Narcissus / Narcissus / Narcissus / Narcissus / Narcissus
                                          Narcissus / Narcissus / Narcissus / Narcissus 

Neck

                    DIAGRAM:  

                          PHOTO:  Marchantia / Fern Prothallium Cross Section

Neck Canal

Nectar

Nectar is a secretion, typically of flowers, that is composed primarily of carbohydrates, that attracts pollinators such as insects and hummingbirds.

Needle-like Leaves

Needle-like leaves are true leaves that are the shape of needles and are typical of pines and firs.

Negative Regions

Negative Charge

Nekton

Neritic Zone

Net Veins

Net Primary Productivity

Netted Veins

Netted vein leaves are typical of dicot plants.  This means that the veins in the leaves are not parallel.  They may be pinnately netted or palmately netted.  If they are pinnately netted they will have one main midvein and many side branch veins (secondaries).  Palmately netted veins will contain several main veins originating from the petiole with many side branch veins.

                    DIAGRAM:   Leaf Veination

                          PHOTO:  

Neuston

Niche

Nitrate

Nitrogen Stress

Nitrogen

Nitrogen Cycle

Node

The places on the stem where the branches, leaves, and flowers attach to the stem.

                    diagram of a node

                    DIAGRAM:  Nodal Structure /Nodal Structure / Intercalary Meristem / Equisetum Stem

                          PHOTO:  

Nodule

Nomenclature

Nostoc

                    DIAGRAM:   Nostoc

                          PHOTO:   Nostoc / Nostoc / Nostoc

Nucellus

Nuclear Membrane

                    DIAGRAM:   Nucleus

                          PHOTO:  

Nucleic Acids

Nucleolus

                    DIAGRAM:   Nucleus / Cytoplasm or Cytosol

                          PHOTO:  

Nucleus

The nucleus is the central portion of the cell that contains the chromosomes of the cells.  It is bounded by the nuclear membrane and is the control center of the cell.

                    DIAGRAM:   Tissue Types
                                            Sieve-Tube Element
                                            Stomata / Stomata
                                            Cytoplasm or Cytosol
                                            Sclerid
                                            Cell Wall

                          PHOTO:   Root Longitudinal Section / Root Longitudinal Section

Nut

Nutlets

Nutrient cycles

Nyctinastic Movements