Answer: B. plays a role in differentiation and elongation of the limb.
Explanation:
Apical ectodermal ridge can be defined as an anatomical structure that develops in the ectodermal cells at the end of the limb bud. It acts as a signaling center that enables the development of the limb. It is present on the distal end of the limb bud.
The ectodermal ridges are associated with the proliferation and differentiation of the mesenchymal cells which favors the rapid elongation of the limb precursor.
Answer:
The progenitor of the platelets is called a megakaryocyte.
Explanation:
Platelets are blood structures, which participate in the process of blood clotting. They are also known as thrombocytes.
The process of platelet formation is called thrombopoiesis, and it consists of
- <em>Formation of megakaryoblasts from the hemocyte, a hematopoietic precursor cell. </em>
- <em>Megakaryoblasts produce </em><em>megakaryocytes</em><em>.
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- <em>Megakaryocytes are precursors to platelet</em><em>s.
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Each megakaryocyte must fragment to form the thrombocytes or platelets.
Answer:
A normal sagittal relationship of the dental arches (ie, neutroclusion) is called Class I. If the position of the mandibular dental arch is too posterior in relation to the maxillary dental arch (ie, distoclusion), it is called a Class II malocclusion.
A shock is a life-threatening problem occurs when vital organs are not receiving enough oxygen. The correct option is C.
<h3>What is a shock?</h3>
Shock is a life-threatening condition caused by a sudden reduction of blood flow through the body.
Trauma, heatstroke, blood loss, an allergic reaction, severe infection, poisoning, burn injuries, or other causes can all result in shock.
When a human is in shock, his or her organs are deprived of blood and oxygen.
Thus, the correct option is C.
For more details regarding shock, visit:
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