Which of the following is a cell fragment? |
|||||||
a) |
Blood platelets |
b) |
Bone cells |
c) |
Lymphocytes |
d) |
Leucocytes |
Which of the following is a cell fragment? |
|||||||
a) |
Blood platelets |
b) |
Bone cells |
c) |
Lymphocytes |
d) |
Leucocytes |
(a)
Blood Platelets occur only in mammals. They are non-nucleated and colourless. They bud off from the megakaryocytic cells of red bone marrow. That’s why they are called blood platelets or cell fragments. They have thromboplastin necessary for blood clotting
Why 1st child of |
|
a) |
Due to the absence of Rh antigen in mother’s blood |
b) |
Due to the presence of Rh antibodies in mother’s blood |
c) |
Due to the absence of Rh antibodies in mother’s blood |
d) |
Both (a) and (c) |
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