Question

Which is the exception out of the three of the kind? and why? Explain how terms are connected.

Proterocladus antiquus         the human placenta         mitochondria                 "Gleomargarita lithophora"

Answer 1

ANS : Proterocladus antiquus :

Paleontologists have discovered the microscopic fossilized remains of green seaweed near Dalian in the Liaoning province of northern China. The microfossils are approximately one billion years old. They represent a previously unknown species of green seaweed, named Proterocladus antiquus, and are barely visible to the naked eyed at 2 mm in length, or roughly the size of a typical flea.

“These new fossils suggest that green seaweeds were important players in the ocean long before their land-plant descendants moved and took control of dry land,” said senior author Professor Shuhai Xiao, a researcher in the Department of Geosciences and Global Change Center at Virginia Tech.

The placenta : is a temporary organ that connects the developing fetus via the umbilical cord to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply; to fight against internal infection; and to produce hormones which support pregnancy.

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

Gloeomargarita lithophora, a cyanobacterium, was found growing associated to microbialites in an alkaline lake in Mexico . This microbe control the formation of intracellular carbonate granules. Ca.G. lithophora is the first bacterium shown to produce internal biomineralizations, as opposed to some other cyanobacteria which can precipitate minerals out of the cell.The ability of intracellular calcification has recently been extended to other members of the Cyanobacteria