Match each term with its corresponding description or definition.
-The endoderm, mesoderm, and ectoderm
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

The endoderm, mesoderm, and ectoderm are the primary germ layers which are the first distinct layers of cells that form during embryonic development.

Answer: C
 Zygote is the initial cell formed when two gamete cells are joined by means of sexual reproduction. It marks the beginning of embryonic development.

Answer: G
 Morula is a solid ball of cells that forms from the zygote as a result of successive mitotic cell divisions. It eventually develops into a blastocyst.

Answer: I
 Blastocyst is a stage of embryonic development that occurs around 5-6 days after fertilization. It is composed of two distinct cell populations- the inner cell mass and the trophectoderm.

Answer: A
 Yolk sac is a membranous sac attached to an embryo that provides nutrients for the developing embryo. It is one of the extraembryonic membranes that develops during embryonic development.

Answer: E
 Amniotic cavity is a fluid-filled space that surrounds the developing embryo/fetus. It is lined by the amniotic membrane and provides a protected environment for the developing fetus.

Answer: F
 Identical twins are developed from a single fertilized egg that splits into two (or more) identical embryos. They are also known as monozygotic twins.

Answer: B
 Fraternal twins are developed from two separate eggs that are fertilized by two different sperm. They are also known as dizygotic twins.

Answer: J
 Placenta is an organ that develops in the uterus during pregnancy. It provides a connection between the developing fetus and the mother, allowing for the exchange of nutrients, gases, and waste products.

Match Each Term with Its Corresponding Description or Definition