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Growth and Development MCQs for MDCAT Practice

Biology section, Growth and Development chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 680 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    In the chick of 18 hour, the structure formed is:
    • Neural plate (correct answer)
    • Neural groove
    • Neural fold
    • Neural tube
    Correct answer: A
    At 18 hours of chick embryo development, the earliest defined structure in neurulation is the neural plate, preceding the formation of the groove and folds.
  2. Question 2
    A pregnancy in which the embryo is implanted in any site other than uterus:
    • Ectopic (correct answer)
    • Tubal
    • Breech
    • Cephalic
    Correct answer: A
    An ectopic pregnancy occurs when an embryo implants outside the uterus, often in the fallopian tube, posing serious risks.
  3. Question 3
    The embryonic stage, which contains a fluid-filled "segmentation cavity," is
    • Cleavage
    • Morula
    • Blastula (correct answer)
    • Gastrula
    Correct answer: C
    The blastula stage of embryonic development is characterized by a fluid-filled cavity known as the blastocoel or segmentation cavity, distinguishing it from earlier and later stages.
  4. Question 4
    The hypoblast is mainly presumptive:
    • Ectoderm
    • Endoderm (correct answer)
    • Mesoderm
    • Blastocoel
    Correct answer: B
    The hypoblast is the initial layer of cells in the bilaminar disc, destined to form the primitive gut lining and extraembryonic endoderm.
  5. Question 5
    Endoderm gives rise to all of the following except:
    • Liver
    • Lungs
    • Thyroid
    • Nervous system (correct answer)
    Correct answer: D
    Master germ layer derivatives! This question tests your knowledge of which embryonic tissues form specific organs, focusing on the endoderm's role.
  6. Question 6
    A connection between fetus and a mother’s womb is:
    • Chorion
    • Amnion
    • Allantois
    • Placenta (correct answer)
    Correct answer: D
    The placenta forms the vital connection between mother and fetus, facilitating nutrient and waste exchange during pregnancy.
  7. Question 7
    The ectoderm develops into the
    • Circulatory system
    • Nervous system (correct answer)
    • Liver
    • Muscles
    • Bones
    Correct answer: B
    Ectoderm differentiation is key for nervous system development. Understanding germ layer derivatives is crucial for embryology questions.
  8. Question 8
    Describe the role of the nucleus in development.
    • It controls the timing of cell division during development. (correct answer)
    • It regulates the differentiation of cells into specific types.
    • It directs the synthesis of all proteins in the cell.
    • It stores all the genetic material for the organism.
    Correct answer: A
    The nucleus houses genetic material, orchestrating development through gene expression and protein synthesis.

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