Recent work in classification of life on Earth has shown that what were once called prokaryotes are much more diverse than ever suspected. The prokaryotae are now divided into two domains, the Eubacteria and the Archaeabacteria, as different from each other as either is from the Eukaryota. One organism, the blue-green algae or cyanobacteria, has left a fossil record that dates back nearly 3.5 billion years and is among the oldest fossils known. These blue-green algae had cell walls and were photosynthetic. A few hundred years ago, this organism was classified as a plant, then as a protist. Today it is classified in the Eubacteria because it
A)
is prokaryotic.
Eliminate
B)
is photosynthetic.
C)
is the ancestor of land plants.
D)
has cell walls and chloroplasts.
Answers
eubacteria is a prokaryote eliminate because all prokaryotic cells are unicellular organism and have a cell wall and both lack nuclear membrane and membrane bound organelles
Option-C
Explanation:
The organisms are classified on the basis of the accepted classification model system universally.
The six-kingdom classification system was provided by the Carl Woese who divided the prokaryotes into two domain: the archaebacteria and the eubacteria.
The eubacteria posses the prokaryotes which shows characteristics of the eukaryotes also like the presence of similar membranes, the mode of nutrition, similarity in the RNA sequences and others.
In the given question, the blue-green algae is considered as eubacteria as it is prokaryote, had cell wall, photosynthetic and posses a eukaryote like organelle called chloroplast.They are not considered eubacteria because they were the ancestors of the land plants.
Thus, Option-C is correct.
To learn more:
1. Chloroplast: https://brainly.in/question/1295766
2. Eubacteria: https://brainly.in/question/1341090