Question is incomplete, the complete question is as follows :
Clotting begins when a _________ occurs in a blood vessel wall. Almost immediately, _______ cling to the blood vessel wall and release _____________ which helps to decrease blood loss by constricting the vessel. __________ is also released by damaged cells in the area. This chemical substance causes ________to be converted to ____________. Once present, thrombin acts as an enzyme to atatch ___________molecules together to form long, threadlike strands of _________, which then traps ____________ flowing by in the blood.
Answer:
Clotting begins when a <u>BREAK</u> occurs in a blood vessel wall. Almost immediately, <u>PLATELETS</u> cling to the blood vessel wall and release <u>SEROTONIN</u>, which helps to decrease blood loss by constricting the vessel. <u>THROMBOPLASTIN</u> is also released by damaged cells in the area. This chemical substance causes <u>PROTHROMBIN</u> to be converted to <u>THROMBIN</u>. Once present, thrombin acts as an enzyme to attach <u>FIBRINOGEN</u> molecules together to form long, threadlike strands of <u>FIBRIN</u>, which then traps<u> ERYTHROCYTES </u>flowing by in the blood.
There are choices for this question namely:
<span>A. cranial
B. lumbar
C. thoracic
D. sacral
E. lumbar and thoracic
</span>
The correct answer is "lumbar and thoracic". The sympathetic nervous system has its preganglionic neurons at the thoracolumbar region of the spinal cord (T1 to L2 or L3) and will synapse to its corresponding ganglion near the spinal cord called the paravertebral ganglia. This is in contrast to parasympathetic nervous system where its preganglionic neurons are found in the cranial and sacral (hence craniosacral) regions and synapse to its corresponding ganglion near the effector organ.
<span>George Beadle and Edward Tatum, projected the theory that only one gene and one enzyme are needed for the metabolic pathway. This has contributed to the science of molecular biology, but was proven to be an incorrect theory.</span>
Answer: Option A.
<u>Explanation:</u>
A graphic organizer is also known as a knowledge map, a concept map, a story map, an advance organizer and cognitive organizer. It is a pedagogical tool that makes use of visual symbols to express knowledge and concept through relationship between them.
In the graphic organizer shown in the question, the graphic organizer of option A best compares natural selection (which are driven by the environmental factors) and the artificial selection (which are driven by the human factors).
