Embryonic Development
Biology ⇒ Reproduction and Development
Embryonic Development starts at 8 and continues till grade 12.
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Describe the main events that occur during gastrulation.
Describe the main function of the amnion in embryonic development.
Describe the role of apoptosis in embryonic development.
Describe the role of the zona pellucida during early embryonic development in mammals.
Explain the difference between determinate and indeterminate cleavage.
Explain the difference between totipotent, pluripotent, and multipotent cells in embryonic development.
A researcher observes that an embryo fails to develop a functional heart and blood vessels. Which germ layer is most likely affected, and why?
A scientist observes that an embryo exposed to a certain chemical during neurulation develops severe brain and spinal cord defects, but other organs form normally. Based on this observation, which developmental process is most likely disrupted, and why?
During which stage does the embryo become a hollow ball of cells?
(1) Zygote
(2) Morula
(3) Blastula
(4) Gastrula
Which extraembryonic membrane is primarily responsible for waste storage in reptiles and birds?
(1) Amnion
(2) Chorion
(3) Allantois
(4) Yolk sac
Which germ layer gives rise to the nervous system?
(1) Ectoderm
(2) Mesoderm
(3) Endoderm
(4) All of the above
Which of the following best describes induction in embryonic development?
(1) The process of cell division
(2) The influence of one group of cells on the development of another group
(3) The formation of the blastula
(4) The fusion of gametes
Fill in the blank: The __________ is the first cavity to appear in the developing embryo.
Fill in the blank: The __________ is the first organ to function in the developing vertebrate embryo.
Fill in the blank: The process of __________ involves the movement of cells to new positions in the embryo to establish the body plan.
Fill in the blank: The process of __________ leads to the formation of the brain and spinal cord from the neural tube.
True or False: Monozygotic twins result from the splitting of a single fertilized egg.
True or False: The endoderm gives rise to the lining of the digestive and respiratory tracts.
True or False: The mesoderm gives rise to muscles, bones, and the circulatory system.
True or False: The notochord is derived from the mesoderm.
