Which event during fertilization leads to the acrosome reaction?

the release of the sperm in the vagina

the binding of the sperm to the zona pellucida

the entry of sperm nucleus inside the egg plasma membrane

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative

Resperation is a way to release carbon back into the atmosphere

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.