Mitochondria and chloroplasts are thought to have once been a free prokaryotic cell.
Bacteria were the first cells.
A phylogenetic tree is a diagram that shows how scientists think different groups of organisms are related. It illustrates the evolutionary relationships among different species or groups based on shared characteristics and genetic information. Phylogenetic trees help to visualize the evolutionary history and common ancestors among organisms.
Scientists believe that plants evolved directly from a freshwater green algae called charophyte. There are two different types of charophytes, coleochaetales and charales, which strongly resemble earliest land plants.
No one knows. Some scientists think we arrived here from space on a comet from another planet, witch is really obnoxious. Like, how could the organisms survive the crash? Why would any stupid aliens send they're organisms to another planet? That entire THEORY is stupid. They all go against the bible and think it's fake. Even though it's the truth! Stupid scientists...they think they know everything.Edited answer:Lfe originated as a unicellular organism on this planet millions of years ago and through evolution ramified into various complex multicellular forms of today. Hence single celled organisms contain all the parts of life.
ui
Bacteria were the first cells.
A branching tree
A Branching tree
True. Think plants.
A branching tree is a diagram that shows how scientists think different groups of organisms are related.
They found organisms from the earliest times that appear to be sea creatures.
A phylogenetic tree is a diagram that shows how scientists think different groups of organisms are related. It illustrates the evolutionary relationships among different species or groups based on shared characteristics and genetic information. Phylogenetic trees help to visualize the evolutionary history and common ancestors among organisms.
Scientists use various characteristics such as genetic material, physical features, reproductive methods, and evolutionary history to classify organisms into different groups and categories. This system of classification helps to organize and understand the diversity of life on Earth.
The scientists think that Europa can have the life on it.
Many scientists consider the possibility life exists elsewhere in our universe (and more particularly even within our own galaxy) quite likely. A few do not think it is likely.
Breathable oxygen, or O2, did not exist in large quantities in the atmosphere until after the evolution of photosynthetic organisms. Hence, early organisms had to have an anaerobic metabolism, or one that did not require oxygen. However, compounds containing oxygen, such as water, have always been necessary to organisms.
by reading genetic codes of organisms that are physically alike to humans( apes, gorilllas, monkeys) and by comparing fossils of organisms. also the bioshemistry and the organs along with its functions.