Which statement is true regarding conjoined twins?
A) Splitting of the inner cell mass may have occurred before gastrulation.
B) Surgical separation is nearly impossible even with minor fusion.
C) Separation of the blastomeres early in cleavage may have occurred.
D) Splitting of the blastomeres or of the embryonic disc is not complete.
E) Two separate oocytes are fertilized at the same time.
D) Splitting of the blastomeres or of the embryonic disc is not complete.
You might also like to view...
Select the three basic components of the cell.
_____ Plasma membrane _____ Cytoplasm _____ Nucleus _____ Nucleoplasm
Compare mitosis to meiosis
a) glycoprotein b) cholesterol c) channel protein d) glycolipid e) phospholipid
Your comprehension of these written words involves which of the following?
A. The Purkinje cells of the cerebellum B. The occipital lobe C. The postcentral gyrus D. The precentral gyrus E. The Wernicke area
Central organ of the lymphatic system is:
(a) tonsils (b) thymus (c) spleen (d) lymph nodes