#9. Which mechanism prevents an ovum from being fertilized by multiple sperm cells?Select one:

a. Once a sperm penetrates the jelly-like coating of the egg, no other sperm cells can penetrate the coating.

b. When more than a single sperm cell fuses with the plasma membrane, multiple zygotes can form, leading to the conception of twins or triplets.

c. When a sperm fuses with the plasma membrane of the egg, depolarization of the membrane occurs.

d. The egg can only survive in the Fallopian tube for 24 hours as it does not have mitochondria to produce energy.

 

#10.Which of the following scenarios does NOT describe an event that leads to the conception of twins?

Select one:

a. High levels of FSH stimulates maturation of three ovums. 

b. One egg is fertilized by one sperm but divides into two zygotes, resulting in two babies of the same gender.

c. Two eggs are fertilized by two sperm cells, resulting in fraternal twins.

d. Two eggs are fertilized by one sperm cell, resulting in monozygotic twins.

For 9 i think its a and for 10 a as well. Not sure if these are correct or not. This is my first time taking bio 30 online. Thank you so much for getting back with me with my questions, this realy helps me to make sure I am on the right track. :)