Biology

Embryonic Development

621 Questions

Embryonic development questions cover the biological processes of gamete fusion, germ layer formation, and fetal maturation. The focus lies in identifying extraembryonic structures, trophoblast functions, and sequential developmental stages. This specialized topic appears regularly in biology screening tests and medical entrance examinations.

Germ layer formationBlastocyst implantationExtraembryonic structuresFetal development stagesReproductive physiology

Embryonic Development Questions

Multiple choice evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Choose the correct answers from the alternatives given.
The archenteron develops into

  1. blastocoel

  2. endoderm

  3. lumen of the digestive tract

  4. placenta
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Archenteron is the primary cavity which is formed at the initial stage of gastrulation. This cavity begins at the dorsal lip of blastopore which is at the one side of the dividing zygote and then this cavity moves through the zygote to the other side which gives rise to the anus. 

So the correct option is 'lumen of digestive tract

Multiple choice biology reproduction in living organisms growth and development in plants sexual reproduction in plants post fertilization - plants

After fertilization, the outer integument forms 

  1. Testa

  2. Tegmen

  3. Perisperm

  4. Pericarp
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

After fertilization process, the different cells in the embryo sac develops to form several parts of the embryo. For instance, the outer integument forms testa, inner integument forms tegmen and ovary wall forms pericarp.

Multiple choice

The telencephalon is derived from which embryonic structure?

  1. Prosencephalon

  2. Mesencephalon

  3. Rhombencephalon

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The telencephalon is derived from the prosencephalon, which is the most anterior part of the embryonic brain.

Multiple choice

What is the term for the small embryo of a grain kernel?

  1. Bran

  2. Endosperm

  3. Germ

  4. Hull
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Germ is the term for the small embryo of a grain kernel.

Multiple choice

What is the term used to describe the small white strands that extend from the yolk to the eggshell?

  1. Chalazae

  2. Albumen

  3. Vitelline membrane

  4. Eggshell membrane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chalazae are the small, twisted strands of egg white that extend from the yolk to the eggshell. They help keep the yolk centered and prevent it from sticking to the eggshell.

Multiple choice

What is the most common type of spina bifida?

  1. Myelomeningocele

  2. Meningocele

  3. Lipomeningocele

  4. Spina bifida occulta
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Myelomeningocele is the most common type of spina bifida, accounting for about 85% of cases. It is a severe birth defect in which the spinal cord and its protective membranes protrude through an opening in the back.

Multiple choice

What is the term for a double-yolked egg?

  1. Double yolk

  2. Twin egg

  3. Conjoined egg

  4. Joined egg
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A double-yolked egg is an egg that contains two yolks instead of one.

Multiple choice

What is the scientific term for the air pocket found at the end of an egg?

  1. Air cell

  2. Chalazae

  3. Albumen

  4. Vitelline membrane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The air cell is a small pocket of air found at the end of an egg, which helps to cushion the yolk and prevent it from sticking to the shell.

Multiple choice

What is the term used to describe the fertilized egg?

  1. Zygote

  2. Embryo

  3. Fetus

  4. Neonate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The fertilized egg is called a zygote, which then develops into an embryo and later a fetus.

Multiple choice

What is the most common type of abdominal wall defect?

  1. Omphalocele

  2. Gastroschisis

  3. Diaphragmatic hernia

  4. Ectopia cordis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gastroschisis is the most common type of abdominal wall defect, occurring in about 1 in 2000 births.

Multiple choice

What is the most common type of neuroblastoma?

  1. Abdominal neuroblastoma

  2. Thoracic neuroblastoma

  3. Pelvic neuroblastoma

  4. Cervical neuroblastoma
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Abdominal neuroblastoma is the most common type of neuroblastoma, accounting for approximately 60% of all cases.

Multiple choice

What is the most common type of neuroblastoma?

  1. Stage 1

  2. Stage 2

  3. Stage 3

  4. Stage 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stage 4 is the most common type of neuroblastoma.

Multiple choice

What is the most common type of Wilms tumor?

  1. Favorable histology

  2. Anaplastic histology

  3. Mixed histology

  4. Teratoid histology
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Favorable histology is the most common type of Wilms tumor.