Biology

Embryonic Development

572 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

Embryonic stem cells are derived from

  1. inner cell mass of blastocyst

  2. blastocoel

  3. inner cell mass of gastrula

  4. cells of trophoblast
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Inner cell mass of blastocyst  or emryoblast lies as a mass of cells in blastocyst  and give rise to embryonic stem cells and this part is used in stem cell research.

Multiple choice

The primitive gut formed during gastrulation is called

  1. blastocoel

  2. vitelline duct

  3. archenteron

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

 Archenteron is formed during gastrulation and is a cavity formed by invagination of cells of vegetal pole of blastula and at the end of gastrulation develops into the digestive tube and thus is considered as the primitive gut.

Multiple choice

Egg apparatus is found

  1. at chalazal end of the embryo sac

  2. in the centre of the embryo sac

  3. at the micropylar end of the embryo sac

  4. between the integuments
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Egg apparatus is present at the micropylar end.

Multiple choice

Which tissue connects embryo to the uterus wall ?

  1. Vagina

  2. Placenta

  3. Oviduct

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

The placenta is the special tissue that connects the developing embryo to the uterine wall, facilitating nutrient, gas, and waste exchange between mother and fetus. The vagina is the birth canal, oviduct is the fallopian tube, and hymen is a membrane.

Multiple choice

Name the period of development of embryo.

  1. Ovulation

  2. Menstruation period

  3. Gestation period

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

The gestation period is the developmental time from fertilization to birth. Ovulation is egg release, menstruation is the monthly cycle, and lactation is milk production after birth.

Multiple choice

Which of the following statements concerning renal development in humans is false?

  1. There are three kidney structures, which form at different times during development.

  2. The final adult kidney forms from the pronephros.

  3. The ureteric bud forms the draining system.

  4. Capillaries invaginate the tubules to form glomeruli.

  5. The final adult kidney rises up the body during development.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the metanephros, which goes on to become the adult kidney.

Multiple choice

What is the correct sequence of development of child from ovum?

  1. Ovum, uterus, foetus, embryo, oviduct, childbirth

  2. Ovum, oviduct, uterus, foetus, embryo, childbirth

  3. Ovum, oviduct, uterus, embryo, foetus, childbirth

  4. Ovum, oviduct, foetus, uterus, embryo, childbirth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct sequence of development of an ovum into child.