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These protozoans form colonies. The large spherical colonies of Volvox globator are composed of several thousand cells around a hollow center.

Volvox

These protozoans form colonies. The large spherical colonies of Volvox globator are composed of several…

These protozoans form colonies. The large spherical colonies of Volvox globator are composed of several thousand cells around a hollow center. This is a type of reproductive cell.

Volvox

These protozoans form colonies. The large spherical colonies of Volvox globator are composed of several…

Volvox is one of the best-known chlorophytes, a division of green algae, and is the most developed in a series of genera that form spherical colonies. A reproductive cell of Volvox globator.

Volvox

Volvox is one of the best-known chlorophytes, a division of green algae, and is the most developed in…

A reproductive cell of Volvox globator.

Volvox

A reproductive cell of Volvox globator.

"Volvox globator. A, entire colony, enclosing several daughter-colonies; B, the same during sexual maturity; C, four zooids in optical section; D1-D5, asexual formation of daughter-colony; E, zooid which has become converted into a mass of microgametes; F, microgamete; G, megagamete surrounded by microgametes; H, zygote; a, early stages in the formation of daughter-colonies; fl, flagellum; ov, ovy, megagametes; pg, pigment spot; spy, zooids containing microgametes." -Parker, 1900

Volvox Globator

"Volvox globator. A, entire colony, enclosing several daughter-colonies; B, the same during sexual maturity;…