Diatoms
The shells themselves are non-living.
Calcium are the main composite of shells and bones.
Protozoa can be 0.01 mm to 1.0 mm in length.*The exact classification and definition of Protozoa has been changing, and should not be confused with Protists. Traditional classification states Protists as one of the five kingdoms; this kingdom is then broken down into the two subkingdoms of Protozoa and Algae. Modern classification generally uses the terms Protozoa and Algae as convenient ways to refer to an organism's characteristics rather than official taxonomic categories.-Protozoa includes heterotrophic organisms (animal-like protists) that are unicellular and usually mobile by their own means. Good examples include Amoebas, Paramecia, and Trypanosomes.-Algae includes photosynthetic Protists (plant-like or autotrophic protists), they can be multi-celled or single-celled. Multi-cellular structures can reach over 300 feet (100 meters) in length; a good example would be kelp.
by a tiny grain of sand actually, they're not. the PEARLS are formed by a tiny grain of sand.
very dirty
Diatoms
Diatoms
Foraminiferans (or forams) are single-celled protists with a calcium carbonate (CaCO3) shell around their plasma membrane. ***Straight out of my biology text book
They're called foraminifera, single-celled protists that construct shells.
With double triggers YES
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One very important impact protists have on the living world is a pathogens (disease causers). Case in point is Endaomeba histolytica a causative agent of dysentery. In many organisms they aid in the gut digesting food. The shells of Sarcodina (Radioloaia) are used as an abrasive. Plasmodium vivax causes malaria.
They eat mussels and other animals with shells.
Double-aught refers to the size of the shot (or pellets) contained within the shell, each of which in this case is roughly 8.1mm (0.33") in diameter.
27 doubles and 8 triples
No made for 2and a half inch shells
NO. 3 1/2 shells are fairly new and only to be shot through rifles rated for it. If it doesn't say it on the barrel, DON'T DO IT!