Answer:
Stem cell is taken either from bone marrow or from the blood directly
Explanation:
Stem cells are derived from two locations primarily a) Bone Marrow and b) Blood
The first step in this process is to remove the stem cell from its parent location and it is done in the following ways –
A) For deriving stem cell from blood – A drug with growth factor s is injected. Here no anesthesia is given to the patient. The growth factors leads to the movement of stem cells from bone marrow into the bloods. Blood with stem cells is taken out from the veins and filtered through the apheresis machine.
B) From Bone marrow – Bone marrow is removed from the pelvic bone through a needle and prepared for transplantation.
Substance A is water and Substance B is chlorophyll
Answer:
a homologous structure is an organ or body part that appears in different animals and is similar in structure and location, but doesn't necessarily share the same purpose.
An example of a homologous structure is the human arm as compared to the wing on a bird.
Ethnic is what you call a group sharing a distinctive cultural traits
Answer:
When Carbon 14 decays by emitting a beta particle, it becomes nitrogen-14.
Explanation:
