Stills Gallery

An unusual Amoeba


This network of cytoplasm is a rare, single-celled undescribed species of Amoeba which displays "shuttle streaming": the cytoplasm oscillates back and forth along the tubular pseudopodia.

A more conventional species of Amoeba


This Amoeba is full of vacuoles containing partially digested food particles. The clear cytoplasm on the left is rich in actin and is forming pseudopodia that determine the direction the cell is moving.

An Acellular Slime Mold


The lacy, yellow cytoplasm belongs to a giant single-celled slime mold that has grown over the surface of a Petrie dish, enveloping and digesting tiny fragments of oatmeal. The most active pseudopodia are at the top left.
     

Protective armour


Many tiny cells have protective cell walls that, in this species of Mallomonas, consist of extraordinarily intricate scales made from pure silica. There are several different types of scales here, all fitting together in a regular pattern.

Endosymbiosis


The several cells of this unusual amoeba are green because they contain green algal cells which have taken up residence inside the host cell; the two organisms have become completely integrated over many millennia and thus given rise to a new type of cell. This process, endosymbiosis, was critical in the evolution of eukaryotic cells, accounting for the origin of mitochondria and chloroplasts.

A Real Drag


This diatom Licmorphora (a type of alga) grows as beautiful fan-shaped colonies that attach to something solid by their tough rubbery stalk. Quite often, that something is a boat and so these cells are a major contributor to those tiresome organisms which cause biofouling and thus have to be scraped off at regular intervals.
           

Frog egg,
cleaving

Developing
tadpole

Tadpoles
hatching

Noctiluca
(dinoflagellate)

Micrasterias
hardyii
(green alga)

Micrasterias sp.

Oedogonium
(green alga);
fertilization

Chlamydomonas
(green alga)
mating

Ceratium
(dinoflagellate)

Mitosis

Volvox
(green alga)

Phacus
(euglenoid
flagellate)

Chara (green
alga) oogonium
and antheridium

Hair cells,
flower

Collotheca
(rotifer)
feeding

Collotheca
(rotifer)
feeding

Stentor
(ciliate)
feeding

Symbiotic algae
in protozoan

Charcesium
(colonial
ciliate)

Chaetoceros
(diatom)

Heliozoa
(unicellular
protist)

Salpingoeca
feeding

Synura (golden
brown alga)

Chromataphores
from fish scale

Plumatella
feeding

Dinobryon
(golden brown
alga)

Dictyocha
(silicoflagellate)

Coleps
feeding

Haematococcus
(green alga)

Striatella
(diatom)
dividing

 
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