Diatoms are a major group of algae, and are one of the most common types of phytoplankton. Most diatoms are unicellular, although they can exist as colonies in the shape of filaments or ribbons, fans, zigzags, or stellate colonies.

Diatoms are a major group of algae, and are one of the most common types of phytoplankton. Most diatoms are unicellular, although they can exist as colonies in the shape of filaments or ribbons, fans, zigzags, or stellate colonies.

DIATOMS are single celled photosynthetic algae that are abundant in Earth’s lakes and oceans.

DIATOMS are single celled photosynthetic algae that are abundant in Earth’s lakes and oceans.

"Pollen grains. Coloured scanning electron micrographs (SEM) of pollen grains from a variety of plants. Including: sunflower (Helianthus annuus), morning glory (Ipomea purpurea), hollyhock (Sildalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and caster bean (Ricinus communis).  Credit: AMI IMAGES/SCIENCE PHOTO LIBRARY"

"Pollen grains. Coloured scanning electron micrographs (SEM) of pollen grains from a variety of plants. Including: sunflower (Helianthus annuus), morning glory (Ipomea purpurea), hollyhock (Sildalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and caster bean (Ricinus communis). Credit: AMI IMAGES/SCIENCE PHOTO LIBRARY"

Caffeine crystals by ANNIE CAVANAGH AND DAVID MCCARTHY. This false-coloured scanning electron micrograph shows caffeine crystals. Caffeine is a bitter, crystalline xanthine alkaloid that acts as a stimulant drug. In plants, caffeine functions as a defence mechanism. Found in varying quantities in the seeds, leaves and fruit of some plants, caffeine acts as a natural pesticide that paralyses and kills certain insects feeding on the plant. The main crystals of caffeine were 400-500 microns…

Caffeine crystals by ANNIE CAVANAGH AND DAVID MCCARTHY. This false-coloured scanning electron micrograph shows caffeine crystals. Caffeine is a bitter, crystalline xanthine alkaloid that acts as a stimulant drug. In plants, caffeine functions as a defence mechanism. Found in varying quantities in the seeds, leaves and fruit of some plants, caffeine acts as a natural pesticide that paralyses and kills certain insects feeding on the plant. The main crystals of caffeine were 400-500 microns…

Scanning electron micrograph of a T4 bacteriophage. Viruses infect every known organism on Earth; these peculiar bug-like ones infect bacteria.

Scanning electron micrograph of a T4 bacteriophage. Viruses infect every known organism on Earth; these peculiar bug-like ones infect bacteria.

Pinterest
Search