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Plankton are organisms drifting in oceans and seas. Zooplankton.

plant Zea Stem C.S. under light mircoscope with white background

Diatoms, algae under microscopic view, phytoplankton, fossils, silica, golden yellow algae

Representing the passage of time, close-up of a sundial in the Cuban municipality of Rafael Freyre which is situated in Holguin Province.

Frontonia sp. is a genus of free-living unicellular ciliate protists under the microscope.

Whiteboard with numbers in a classroom

Daphnia - micro organism

Chemical formula on blackboard in classroom or laboratory.

Photomicrograph of rotifer, probably Rotaria rotatoria. Rapidly rotating cilia at top of head, internal organs visible. Green circles are algae. Live specimen. Original image at 40X, wet mount, transmitted brightfield illumination. Indistinct image due to motion blur of live specimen and very shallow depth of field of brightfield illumination.

Set of Roman numerals (numbers) and arabic numbers 1 to 0 handwritten in white chalk on a blackboard background. Concept of education and learning.

Spore bags of helminthosporium contain 8 cells. This disease causes helminthosporiosis of wheat. Soon very small and quite harmful.

stx2a is a subtype of Shiga toxin-producing E. coli (STEC) linked to Hemolytic Uremic Syndrome (HUS), a severe condition impacting kidney function and blood clotting. STEC poses a significant risk of foodborne illness and can spread within communities including family members.

Marine aquatic plankton under the microscope view

Scribbles on collection of papers

Euglena is a genus of single cell flagellate eukaryotes under microscopic view for study.

Burkitt lymphoma is a form of non-Hodgkin's lymphoma in which cancer starts in immune cells called B-cells. Recognized as a fast growing human tumor, Burkitt lymphoma is associated with impaired immunity and is rapidly fatal if left untreated.

Freshwater aquatic zooplankton and algae under microscope view

amazing inhabitants of the microworld under a microscope

Old blackboard in a classroom with math problems

A large group of tadpoles (Gavialis gangeticus) clustered in lake water

Close up macro of antique Italian Atlas: Orion constellation

Study of Parasitic helminths (Trematodes) of marine fishes under a microscope.

Cheyletiella blakei Mite - Small Cat pest view under a microscope

Lepocinclis acus or euglena acus, a single cell flagellate eukaryote under the microscope

Trematode parasite under a microscope

Photomicrograph of Paramecium caudatum. Consists of only one cell. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.

Microalgae under microscopic view, green algae, cyanobacteria, phytoplankton, diatom, algae mix collage background

Photograph of autotrophic Euglena through microscope under brightfield illumination.

Natural agate surfaces, suitable for backgrounds and wallpapers.

Free Images: "bestof:Plate 082 Chordates of the Classes Chondrichthyes and Osteichthyes John Snape"

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