Match each term with its corresponding description or definition.
-Twins that develop from one fertilized egg and are genetically identical
A)Yolk sac
B)Fraternal twins
C)Zygote
D)Histogenesis
E)Amniotic cavity
F)Identical twins
G)Morula
H)Primary germ layers
I)Blastocyst
J)Placenta

Question

Quizplus · Accepted Answer

Identical twins are twins that develop from one fertilized egg and are genetically identical.

Answer: B
 Fraternal twins are twins that develop from two separate eggs fertilized by two different sperm and are no more genetically similar than any two siblings.

Answer: C
 A zygote is a single cell that develops when an egg is fertilized by a sperm.

Answer: D
 Histogenesis is the process by which the three primary germ layers (ectoderm, mesoderm, and endoderm) differentiate into the various tissues and organs of the body.

Answer: E
 The amniotic cavity is the fluid-filled space within the amniotic sac that surrounds the developing embryo.

Answer: G
 A morula is a solid ball of cells that forms after a zygote undergoes several rounds of cell division.

Answer: H
 The three primary germ layers (ectoderm, mesoderm, and endoderm) are the layers of cells that form during gastrulation and differentiate into the various tissues and organs of the body.

Answer: I
 A blastocyst is a hollow ball of cells that forms about 5 days after fertilization and implants in the uterine wall.

Answer: J
 The placenta is an organ that develops during pregnancy and provides nutrients and oxygen to the developing fetus while removing waste products.

Match Each Term with Its Corresponding Description or Definition