Biology (Day 23; Fertilization and Development)

Question 1

Fertilization

Answer 1

the process in sexual reproduction in which a female gamete and male gamete fuse to form a new cell

Question 2

Zygote

Answer 2

A cell that results from fertilization

Question 3

Apoptosis

Answer 3

The process of programmed cell death

Question 4

Differentiation

Answer 4

the process by which cells become specialized in structure and function

Question 5

1st stage of human development: Zygotic stage

Answer 5

the zygote is formed when the male gamete (sperm) and female gamete (egg) fuse

Question 6

2nd stage of human development: Blastocyst stage

Answer 6

the single-celled zygote divides into a solid ball of cells; then, it becomes a hollow ball of cells called a blastocyst, attaching to the lining of the mother’s uterus

Question 7

3rd stage of human development: Embryonic stage

Answer 7

the major internal organs and external features begin to emerge, forming an embryo

Question 8

4th stage of human development: Fetal stage

Answer 8

once the formed features of the embryo begin to grow and develop, the organism is considered a fetus; differentiation happens during this time