1) Eubacteria.
https://upload.wikimedia.org/wikipedia/commons/thumb/7/78/Collapsed_tree_labels_simplified.png/400px...
I believe the answer is A. Juvenile fish and shrimp
The right answer is The first image (the left one).
An atrium is an upper cavity of the heart, delimited by a thin wall, receiving blood from the bloodstream. There are two in the human heart, they allow the passage of blood from the veins (cellars and lungs) to the ventricles (right and left).
In its upper part (near the entrance of the superior vena cava) is located the sinus node, microscopic structure from which the electrical impulse which ensures the contraction of the heart (especially atrium) ...
The depolarization of the action potential is conducted step by step in the cells of the right and left atria, accompanied by a contraction of the muscle fibers.
Answer: The Adenosine triphosphate is the molecule that provides energy to all the living structures like plants, animals and human beings. Energy is required for all the vital processes of the body.
The ATP molecule consists of three components. The sugar lies at the centre (ribose sugar that is found in the RNA).
Both sides of the sugar is attached by two different components. One side of the sugar is attached by the base(adenine) and the other side of the sugar is attached by the phosphate group.
This phosphate molecule is the most important part for the activity of ATP.
I think it isn't right to claim that an attribute developed so the species included can survive better, qualities advance since people with that characteristic survive better and duplicate more.
I hope the answer will help you.
