The correct answer is they are produced by cyanobacteria.
Stromatolites are being produced by cyanobacteria.
Stromatolites are termed as layered mounds, which have columns and also sheet like rocks which are originally formed with growth of layers.
Lichen stromatolites is a type of stromatolite which is formed by layered structures rocks and they are formed above water.
Answer: produced by cyanobacteria.
Stromatolites are sedimentary rocks in the form of layered mounds, sheet like structures, columns and dome shaped structures. The primary composition of these sedimentary rocks is the limestone. These are found in the shallow waters and are usually formed by the cynobacteria and other single celled organisms such as algae and lichen.
The answer is Ribosomes.
Ribosomes are supramolecular complexes of proteins and ribonucleic acid, present in all cells. Ribosomes are organelles of the cytoplasm of a cell are composed of water, proteins and RNA, and whose function is to participate in the synthesis or manufacture of proteins from the information contained in the DNA, which arrives transcribed to ribosomes in the form of RNA messenger (mRNA).
Kidneys are the structure of the excretory system in humans is responsible for converting ammonia into urea. Lungs is used to filter air and separate oxygen from carbon dioxide (respiratory system); Liver produces juice that furthers the digestion (digestive system) and skin can be part of the excretory system because of the sweat glands.