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 biology reproductive health twins reproduction and modern technology stds and infertility

Embryo with more than 16 blastomere formed due to in vitro fertilization is transferred into

  1. Cervix

  2. Uterus

  3. Fallopian tube

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

The zygote or early embryo (upto 8 blastomeres stage) is transferred to fallopian tube called zygote intra fallopian transfer or ZIFT. IUT (Intrauterine transfer), the embryo with more than 8 blastomeres is transferred into the uterus. So, the correct answer is 'Uterus'.

Multiple choice biology reproductive health twins reproduction and modern technology stds and infertility

Embryo with more than $16$ blastomeres formed due to in vitro fertilisation into.

  1. uterus

  2. Fallopian tube

  3. fimbriae

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

In vitro fertilization stands for fertilization outside the body in almost similar condition as that in the body is a method of assisted reproductive technology. In this method to ovum from the wife or donor and sperm from the husband of doner are collected and fused to form zygote in the simulated condition in the laboratory. The zygote or the early embryo up to 8 blastomeres is transferred into the fallopian tube which is known as zygote intrafallopian transfer when the embryos are more than 8 blastomeres then they are transferred into the uterus and this is known as an intrauterine transfer.

So, the correct option is 'uterus'

Multiple choice biology diversity in living world characteristics of annelida and arthropoda characteristics of platyhelminthes and aschelminthes basis of classification in animals

Body cavity of animals derived from Blastocoel is known as

  1. Pseudocoelom

  2. Schizocoelom

  3. Enterocoelom

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

Schizocoelom develops as a split in the mesoderm, e.g.-Arthropods, Annelids, and Molluscs. Enterocoelom is derived from the wall of embryonic gut, e.g.-Echinoderms, and Chordates. Haemocoel is the blood-filled cavity of arthropods. Pseudocoelom is also known as a false cavity.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Consider the following statements and choose the correct options.
I. Ovule is attached to the placenta by means of a stalk called filaments.
II. Ovule fuses with the stalk in the region called hilum.
III. The two protective envelopes of the ovule are called integuments.
IV. The small opening in the tip of ovule is called germ pore.

  1. I and IV

  2. I and III

  3. II and IV

  4. II and III
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology cell structure animal cell plant and animal cell cell structure and micro-organisms

Which of the following cells are present in the endoderm of Hydra, but not in epidermis ?

  1. Cnidoblasts and interstitial cells

  2. Glandular cells and endothelio-muscular nutritive cells

  3. Cnidoblasts and germ cells

  4. Interstitial cells and sensory cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Stinging cells or nematocyst are present on the outer region of the body as small swellings and are hence a part of the epidermis.
  •  The germ cells are also a part of the ectodermal epithelium.
So, the correct answer is 'Stinging cells and germ cells'.

Multiple choice zoology respiration in organisms respiration in human beings respiration and associated structures respiration in humans

Respiratory system is derived from

  1. Ectoderm

  2. Endoderm

  3. Both A and B

  4. Endoderm and mesoderm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The respiratory system represents the organs that are involved in the exchange of oxygen and carbon dioxide between the organism and the environment.
  • In animals, a primary layer of cells is formed during embryogenesis, three in number and are differentiated as ectoderm, mesoderm, and endoderm. The tissues produced by these layers give rise to the organs of the body. 
  • The respiratory tract with tracheae, bronchi, alveoli of the lungs is developed from the endoderm. The mesoderm forms the mesothelium from which lines the thoracic cavity and external intercostal muscles.
    Hence, the correct answer is D.
Multiple choice microsporophyll vs megasporophyll plant kingdom biology

The filiform apparatus is present in ________.

  1. Synergids

  2. Egg cell

  3. Antipodals

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

The synergids have special cellular thickening at the micropylar tip called filiform apparatus, which plays an important role in guiding the pollen tube into the synergid.

Multiple choice biology structural organization in living organisms tissues of plants levels of organisation in plants kinds of plant tissue

Periblem form

  1. Endodermis

  2. Cortex

  3. Both of (A) and (B)

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

Histogen theory was proposed by Hanstein in 1870. According to this theory,  shoot apical meristem consists three distinct zones namely, dermatogen (external layer) which form outer covering of all organ of plant. Periblem (middle layer) which gives rise to cortex and endodermis. Plerome (central layer) which forms pith and primary vascular bundle. 
Thus, the correct answer is option C.

Multiple choice botany plant tissues introduction to tissue tissues - "the teams of workers" introduction to tissues

Histogen theory states that epidermis is derived from the

  1. Periblem

  2. Cambium

  3. Cortex

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

According to histogen theory by Hanstein, the three principal tissues of the root, vascular cylinder, cortex and epidermis originate from three groups of initial cells or histogens, in the apical meristem plerome, periblem and dermatogen respectively. A fourth histogen, the calyptrogen produces the root cap. 
Thus, the correct answer is option D.

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Muscle tissue is formed during

  1. After 7th month of pregnancy

  2. Just before the birth

  3. Embryonic development

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

During embryonic development, the cells are pluripotent, meaning they have the capability to develop and differentiate into almost all cell types including muscle cells. Precisely, muscle cells are formed from the mesoderm of the embryo. So, the correct answer is ‘Embryonic development’.

Multiple choice zoology applications of biotechnology cloning process of cloning gene cloning

The technique in which the developing embryo (at definite stage) from a pregnant superior breed is removed and transferred to another female with inferior characters, in whose body further development till birth takes place. Such technique is called as

  1. Embryo transfer

  2. Artificial insemination

  3. Protoplast fusion

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

  • Embryo transfer is the technique in which the developing embryo from a pregnant superior breed is removed and transferred to another female with inferior characters for establishing the pregnancy and in whose body further development takes place till birth. It is used in humans as well as animals.

So, the correct answer is 'Embryo transfer'.

Multiple choice zoology applications of biotechnology cloning process of cloning gene cloning

The nucleus of a donor embryonal cell/somatic cell is transferred to an enucleated egg cell. Then after the formation of an organism, what shall be true?

  1. Organism will have extranuclear genes of the donor cell

  2. Organism will have extra nuclear genes of recipient cell

  3. Organism will have extra nuclear genes of both donor and recipient cell

  4. Organism will have nuclear genes of recipient cell
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is given that the recipient cell has  been enucleated. It means its nucleus or genetic material has been removed. Hence, the organism that will develop from it would have the nuclear genes of donor embryonal/ somatic cell. Hence, the organism will have extra nuclear genes of recipient cell. 

Thus, the correct answer is 'Organism will have extra nuclear genes of recipient cell.'

Multiple choice zoology plant reproduction earthworm - reproductive system reproduction in earthworm introduction to reproduction

The term blastogenesis is used for

  1. Formation of blastula

  2. Formation of blastocoel

  3. Formation of blastomeres

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

Blastogenesis is the process of formation of offsprings asexually from reproductive bodies and does not include meiosis and fertilization. 

So, the correct answer is option D.

Multiple choice botany life processes in living organisms- part 2 earthworm - reproductive system reproduction in earthworm introduction to reproduction

Development of embryo from unfertilized egg is called as

  1. Parthenogenesis

  2. Apogamy

  3. Pseudogamy

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

Parthenogenesis is a type of asexual reproduction in which the embryo grows and develops from egg without fertilization. Apogamy is a type of reproduction in which sporophyte develops from a gametophyte without fertilization. Parthenocarpy is the phenomenon of development of fruit without fertilization. In this, fruits are seedless. Pseudogamy is a form of reproduction in which the embryo develops from egg following the stimulus of pollination but without fertilization. It involves activation of egg by sperm but does not involve nuclear fusion. 

Thus, the correct answer is option A.

Multiple choice zoology reproduction in organisms earthworm - reproductive system reproduction in earthworm introduction to reproduction

Development of an unfertilized egg is called

  1. Parthenogenesis

  2. Metamorphosis

  3. Gametogenesis

  4. Paedogenesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The process of development of an embryo from an unfertilized egg is known as parthenogenesis. It is a natural form of asexual reproduction. They are considered as the clone of the parent.
Paedogenesis is the process of reproduction by larval animals. Fertilization do not take place and the development take place due to metamorphosis.
Metamorphosis is the process of development of organism after birth or hatching. It mainly takes place in the presence of thyroid hormone.
Gametogenesis is the process by which gametes are formed.
So, the correct answer is option A.