Dandelions

Daughter Cell

Daughter Nuclei

Day-neutral

DDT

Deciduous

Deciduous Forest Biome

Decomposer Food Chain

Decomposition

(needles in forest)

Deer

Degradation

Dehiscent

                    DIAGRAMS:  Silique Dehiscent Fruit

                          PHOTOS:

Dehydrated

Deliquescent

Deliquescent branching is a type of branching that is exhibited by an oak or maple tree.  There is a short main trunk with irregular branching above the short main trunk.  This is also known as Sympodial Branching.

Dependent

Depletion

Desert Biome

Desert Bighorn Sheep

Deserts

                    DIAGRAMS:  Biome Comparisons

                          PHOTOS:

Detritus Food Chain

Diaplanetism

Diarch

Diatoms

Dichotomous

Dichotomous branching is where the stem repeatedly forks.  It forks into to branches, and then each of those two branches fork, etc.  This is quite common in the lower tracheophyte plants such as Psilotum, Selaginella, and Lycopodium.

Dichotomous Key

Dichotomous Habit

Dicots

Dicots are plants that are characterized by a two cotyledons (seed leaves) in the seed, netted veins leaves, vascular bundles in a ring, flower parts in fours or fives or multiples of fours or fives, and a vascular cambium with secondary growth and concentric growth rings.

                    DIAGRAMS:  

                          PHOTOS: 1-Year Tilia Stem / 2-Year Tilia Stem
                                            3-Year Tilia Stem / 3-Year Tilia Stem / 3-Year Tilia Stem
                                            6-Year Tilia Stem / 6-Year Tilia Stem / 6-Year Tilia Stem

                                            Dicot Root / Dicot Root / Dicot Root / Dicot Root
                                            Dicot Root

Dicotyledonae

Dictyosomes

                    DIAGRAMS:  Golgi Complex

                          PHOTOS:

Differences

Differentiation

Differential Flow

Differentially Permeable Membrane

Differentiation

(hormone)

Diffusion

Digestive Tract

Dikaryon

Dill

Dilute Solution

Dioecious Flower

Dioon spinulosum

Diploid

Discs

(marchantia)

Disk Flowers

                    DIAGRAMS:

                          PHOTOS:  Composite Flower / Composite Flower
                                             Composite Flower / Composite Flower

Disintegrate

Dispersion

Dissolve

Distantly Related

Divert

(mono lake water)

Division

Division of Labor

DNA

                    DIAGRAMS:  Nucleus

                          PHOTOS:

Domains

Dominant Species

(polluted lakes and ponds)

Dormant

Dormant refers to plants that are living but are not growing.  This is typical of seeds, plants that live in temperate regions of the earth, lose their leaves during the winter, and stop growing.  In the spring, these plants break dormancy and begin to grow.  Seeds break dormancy by soaking up moisture and beginning to send out shoots and roots.

Dorsal Suture

Douglas Fir

Drainage

Drought

Drupe

Druplets

Dry pericarp

Dual

Duration

(light)

Dynamic

Dynamic equilibrium