Cloning by embryo splitting
A. uses an unfertilized egg as the starting point.
B. does not require the use of a host uterus.
C. cannot be used for cloning human embryos.
D. is characterized by all of these.
E. is characterized by none of these
A
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Chloroplasts are thought to have evolved from cyanobacteria. Which of the following observations support this hypothesis? (Select all correct choices.)
A. They both have similar internal membranes that organize the light reactions of photosynthesis. B. They both have small circular DNA genomes. C. They both have cell walls. D. They both have the capability of movement through flagella.
Which of the following sequence of events of fertilization is in the proper order?
A. acrosomal reaction, binding of sperm to egg membrane, fast block to polyspermy, increase in egg cytosolic calcium, and then the slow block to polyspermy B. binding of sperm to egg membrane, acrosomal reaction, fast block to polyspermy, slow block to polyspermy, and then an increase in egg cytosolic calcium C. binding of sperm to egg membrane, acrosomal reaction, fast block to polyspermy, increase in egg cytosolic calcium, and then the slow block to polyspermy D. acrosomal reaction, fast block to polyspermy, binding of sperm to egg membrane, increase in egg cytosolic calcium, and then the slow block to polyspermy E. acrosomal reaction, fast block to polyspermy, binding of sperm to egg membrane, slow block to polyspermy, and then an increase in egg cytosolic calcium
Klinefelter syndrome patients who are mosaics have some cells with 46, XY and others with
____________________. Fill in the blank(s) with the appropriate word(s).
During viral reproduction, HBV form an immature core particle made up of which components?
A. Core protein B. Reverse transcriptase C. Plus-strand RNA pregenome D. All of these make up the immature core particle.