Free Embryonic Development MCQs with Answers
46 Embryonic Development MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Embryonic development begins after fertilization with cleavage and formation of the morula and blastula, followed by gastrulation and the establishment of germ layers. It includes organ formation, tissue differentiation and early growth, rather than the later increase in size associated with postnatal development.
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- A. Morulation
- B. Blastulation
- C. Gastrulation
- D. Organogenesis
Explanation: Germ layers that are ectoderm, endoderm, and mesoderm are formed during gastrulation.
Correct answer: Gastrulation- A. Nutritional Cause
- B. Hormonal Causes
- C. Skeleton Damage
- D. Genetic Defect
Explanation: Explanation: Microcephaly, the small-sized skull, is usually due to a genetic defect.
Correct answer: Genetic Defect- A. Hensen's Node
- B. Primitive Ridge
- C. Gastrocoel
- D. Primitive Gut
Explanation: Explanation:At the cephalic end of the primitive streak, closely packed cells form a locai thickening known as Hensen's node.
Correct answer: Hensen's Node- A. Muscle cells
- B. Gut
- C. Notochord and neural tube
- D. Larval epidermis
Explanation: [A]Sarcoplasm is the cytoplasm of muscle cell which is yellow in colour[B] Gut is produced by grey vegetal cytoplasm[C] Notochord and…
Correct answer: Notochord and neural tube- A. Mesoderm
- B. Ectoderm
- C. Endoderm
- D. Mesoderm and Endoderm
Explanation: Option [A]Mesoderm gives rise to muscular,skeletal and reproductive systemsOption [B] After embryonic development the body layers[…
Correct answer: Ectoderm- A. Respiration and reproduction
- B. Reproduction and nourishment
- C. Strong of wase products
- D. Respiration and storage of waste products
Explanation: During the development of chick and other vertebrates, there are produced certain tissues or structures that temporarily or permanently do…
Correct answer: Respiration and storage of waste products- A. Pincer cells
- B. Blastomers
- C. Nephrotome
- D. Parietal
Explanation: Pincer cells are deformed blood cells which are a characteristic feature of hereditary spherocytosis associated with Protein Band-3…
Correct answer: Nephrotome- A. Orgenogenesis
- B. Blastula
- C. Gastrula
- D. Development
Explanation: Zygote develops by a sequence of mitotic division, called cleavage, into a multicellular structure, first a solid ball of cells the…
Correct answer: Blastula- A. Cleft palate
- B. Polydactyly
- C. Hard-palate
- D. Microcephaly
Explanation: A cleft palate is a congenital condition often associated with a hare lip, involving an opening or split in the upper lip and/or roof of…
Correct answer: Cleft palate- A. Pericardial fluid
- B. Allantoic fluid
- C. Amniotic fluid
- D. All of these
Explanation: Amniotic fluid plays a crucial role in protecting the developing embryo/fetus against physical trauma.
Correct answer: Amniotic fluid- A. It occurs only in zygote
- B. It occurs in all body cells
- C. It results in haploid cells only
- D. It results in identical cells
Explanation: Cytokinesis during cleavage results in identical cells as the parent cell divides into two daughter cells.
Correct answer: It results in identical cells- A. Amphibians
- B. Reptiles
- C. Birds
- D. Fish
Explanation: Embryonic membranes like the amnion and chorion first appeared in reptiles, making option B the correct answer.
Correct answer: Reptiles- A. Ectoderm
- B. Mesoderm
- C. Epidermis
- D. Endoderm
Explanation: During embryonic development, the digestive system originates from the endoderm, which is one of the three primary germinal layers.
Correct answer: Endoderm- A. Area pellucida
- B. Area opaca
- C. Notochord
- D. Primitive streak
Explanation: During the development of a chick embryo, the peripheral part of the blastoderm that remains attached and unseparated from the yolk forms…
Correct answer: Area pellucida- A. Fish
- B. Amphibian
- C. Reptiles
- D. None
Explanation: Extra embryonic membranes like amnion and chorion appeared for the first time in reptiles.
Correct answer: Reptiles- A. Muscles
- B. Liver
- C. Gonads
- D. Blood vessels
Explanation: GERM LAYERS: A germ layer is a group of cells in an embryo. There are 3 germ layers: the endoderm (inner layer), the ectoderm (outer…
Correct answer: Liver- A. unipotent
- B. multipotent
- C. totipotent
- D. pluripotent
Explanation: Totipotent is an immature cell that is capable of giving rise to any cell type or even a complete embryo.
Correct answer: totipotent- A. ectoderm
- B. mesoderm
- C. endoderm
- D. all of the above
Explanation: Muscles develop from the mesoderm, which is one of the three primary germ layers in the early embryo.
Correct answer: mesoderm- A. Ectodermal
- B. Endodermal
- C. Mesodermal
- D. Preformed
Explanation: The correct answer is Endodermal. The endoderm, one of the three primary germ layers formed during embryonic development, is responsible…
Correct answer: Endodermal- A. 2nd week
- B. 3rd week
- C. 7th week
- D. 5th week
Explanation: Implantation is the process of the blastocyst embedding into the endometrial lining of the uterus, which typically occurs in Week 2 of…
Correct answer: 2nd week