volvox algae under microscope - 400x

400x alga algae aquaculture asexual aureus background biology botany brightfield cell cells chloroplast colonial darkfield daughter division educational fauna flora freshwater grand green inside lab laboratory lesson life macro magnification micro microbiology microscope microscopic microscopical nature offsprings organism plankton pond protozoa reproduction school science spherical training volvox water zygnematophyceae zygote