PLEASE HELP I WILL MARK BRAINALIST

Select all the true statements about the cosmic microwave background radiation

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

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.