If the hydrogen compound of the substituent already in the benzene nucleus can be directly oxidized to the' corresponding hydroxyl compound , then meta- derivatives predominate on further Substitution, if not ,then orthoand paraderivatives.
Answer:
A. Equal to cardiac output
Explanation:
Venous return refers to the rate at which blood flows back to the heart.
Averaged over a few heartbeats and over steady state conditions, venous return is equal to cardiac output. This is because the cardiovascular system is a closed loop made up of the pulmonary and systemic circulations.
The reason why the venous return must equal cardiac output is to avoid the accumulation of blood in one of the two circulations in the cardiovascular system.
Some of the mechanisms for venous return include;
1.) Exercise
2.) Gravity
3.) Thoracic pump and
4.) Pressure Gradient
5.) Skeletal muscle pump
Could it by any chance be ionic
Answer:
D) Radioactive sulfur.
Explanation:
The process begins by labelling the yeast with the radioactive sulfur and then it is incorporated into the peptides. Then the scientists can detect and isolate small portions of it.
Radioactive sulfur is preferred for this process because it is short-lived.