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

The plant roots under the microscope

The nematode Steinernema feltiae under the microscope, the species used as a biopesticide to infect fungus gnats in agriculture and gardening.

In vitro bacterial culture

False color image of diatom under the microscope

Aspergillus fumigatus is one of the most common Aspergillus species to cause disease in individuals with an immunodeficiency. This pathogen primarily causes invasive infection in the lung.

Abstract designed black, gray and white wallpaper background image for computer desktops.

Close up of a Petri dish with blue specimens in it

A colony of a common fungus seen at high magnification on white background

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

Several clusters of human Human Embryonic Kidney 293 cells in culture. These cells are a standard cell line used in biotechnology applications, for example to produce proteins. This view is as it appears through an inverted biological phase contrast microscope with 200x magnification.

In vitro bacterial culture

Photomicrograph of one celled amoeba. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.

Microscopic photo of a thin section of calcareous tufa of Holocene age.

red laser dot circle, abstract macro view on black background

Natural agate surfaces, suitable for backgrounds and wallpapers.

$Fractal art background for creative design. Abstract fractal. Decoration for wallpaper desktop, poster, cover booklet, card. Psychedelic. Print for clothes, t-shirt. Magic graphics.$

Sea life Nudibranch eggs underwater

multicolor light spots abstract background

In vitro bacterial culture

unsporulated oocyst of Eimeria/Isospora isolated from infected samples of a Labrador retriever puppy

Perfect shape of sponge cake.

Microscopic image showing oxalate crystals from urine sediment, most common cause of kidney stones

Abstract Crystal background marble shot, nature pattern.

Symbolic illustration of infectious viruses under the microscope, for example influenza viruses, smallpox, measles or similar. Medical research and investigation of diseases and healthcare concept.

Petri dish at lab

Microscopic view of face powder, x400 magnification

3D rendering of microscopic particles and bubbles

Sporulated oocyst of Eimeria/Isospora isolated from infected samples of a Labrador retriever puppy

Mosquito leg under light microscope with white background

Free Images: "bestof:Scintillating scotoma.gif scintillating scotoma experienced by the author in June 2011 It is to be looked on at the center of the image The aura was shaped like"

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US_Navy_110612-N-AE328-076_Ensign_Tiffany_Hunter_answers_questions_about_the_ship_while_giving_a_tour_during_Portland_Fleet_Week_and_the_city's_104.jpg

US_Navy_110608-N-RC734-139_Fire_Controlman_2nd_Class_Colin_Roberts,_center,_gives_familiarization_training_on_the_M240_machine_gun_during_a_live-fi.jpg

US_Navy_110614-N-YZ910-001_Rear_Adm._Tim_Alexander,_center,_commander_of_Navy_Region_Southeast,_and_Capt._Trey_Wheeler,_right,_commander_of_Patrol.jpg

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DISCOVER_AQ_Research_Plane_Arrives_(201106280003HQ)_DVIDS841701.jpg

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US_Navy_110614-N-MA266-233_Reserve_component_Sailors_stand_as_side_boys_for_Vice_Adm._Harry_B._Harris_Jr.jpg

US_Navy_110618-N-KB563-188_Dr._Jose_Ramos-Horta,_President_of_Timor-Leste,_center,_waves_to_the_crowd_as_Capt._Jesse_A._Wilson_watches_the_start_of.jpg

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US_Navy_110627-N-YY999-083_Kurt_Campbell,_center,_Adm._Patrick_Walsh,_right_and_Brig._Gen._Richard_Simcock_prepare_to_lay_a_wreath_at_the_Battle_of.jpg

US_Navy_110629-N-ZI300-042_USS_Thach_(FFG_43),_front,_BAP_Mariategui_(FM_54),_center,_and_USS_Boone_(FFG_28)_move_into_formation_for_a_photo_exerci.jpg

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US_Navy_100629-N-7367K-002_Former_astronaut_Fred_Haise,_a_lunar_module_pilot_on_Apollo_13,_speaks_to_service_members_at_the_Training_Hall_at_Naval_Construction_Battalion_Center,_Gulfport.jpg

US_Navy_110603-N-HW158-021_Rear_Adm._Mathias_W._Winter_and_Culinary_Specialist_2nd_Class_Richard_Coggins_lay_a_wreath_to_commemorate_the_69th_anniv.jpg

US_Navy_110603-N-HW158-025_Rear_Adm._Mathias_W._Winter_and_Culinary_Specialist_2nd_Class_Richard_Coggins_bow_their_heads_for_a_moment_of_silence_du.jpg

US_Navy_110606-N-AD372-109_Master_Chief_Petty_Officer_of_the_Navy_(MCPON)_Rick_D._West_inspects_students_attending_the_Navy_Medicine_Training_Cente.jpg

US_Navy_110621-N-HW977-079_Capt._Jay_Kadowaki,_right,_signs_a_Memorandum_of_Understanding_with_U.S._Coast_Guard_establishing_first-ever_partnership.jpg

US_Navy_110623-N-RM525-068_Jorge_Sanchez_akes_a_look_around_the_flight_deck_during_a_tour_aboard_USNS_Comfort_(T-AH_20).jpg

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US_Navy_110611-N-UO379-185_Operations_Specialist_2nd_Class_Stephen_Sittner,_from_Denver,_identifies_and_tracks_air_contacts_in_the_Combat_Direction.jpg

US_Navy_110614-N-MA266-821_Machinist's_Mate_1st_Class_Tim_Benson,_a_reserve_component_Sailor,_nteracts_with_the_public_at_the_Riverbend_Festival.jpg

US_Navy_110616-N-ZB612-080_During_the_Military_Strategy_Forum,_Chief_of_Naval_Operations_(CNO)_Adm._Gary_Roughead_answers_questions_on.jpg

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