1 The ____ is a hollow ball of cells that develops from the morula.A) blastocyst B) ovidiuct C) ovary D) chorion 2 The procedure in which sound waves are converted to images of the fetus is called ____.A) Chorionic villus sampling B) Amniocentesis C) Ultrasound D) DNA analysis 3 What do the inner and outer surfaces of the placenta consist of?A) amniotic tissue and corpus luteum B) chorion and uterine tissue C) amniotic tissue and blastocyst D) corpus luteum and chorion 4 During fertilization, what process allows steps 1-4 to occur, as shown here? (24.0K)A) ovum travels through oviduct B) lysosome strengthens the plasma membrane C) hundreds of sperm penetrate the plasma membrane D) acrosome enzymes weaken the plasma membrane 5 What are the four extraembryonic membranes in fetal development?A) acrosome, placenta, plasma membrane, morula B) placenta, morula, blastocyst, yok sac C) amnion, chorion, yolk sac, allantios D) amnion, yolk sac, acrosome, morula