Embryonic Development
Biology ⇒ Reproduction and Development
Embryonic Development starts at 8 and continues till grade 12.
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Describe the difference between embryonic and fetal development.
Describe the role of the placenta in embryonic development.
Describe what happens during cleavage in embryonic development.
Describe what happens if the neural tube fails to close during embryonic development.
Explain the importance of cell signaling during embryonic development.
Explain the significance of gastrulation in embryonic development.
Explain why identical twins have the same genetic material.
A researcher observes an embryo in which the heart and blood vessels are not developing properly. Which germ layer is most likely affected?
(1) Ectoderm
(2) Mesoderm
(3) Endoderm
(4) Trophoblast
In mammals, implantation of the embryo occurs in the:
(1) Ovary
(2) Fallopian tube
(3) Uterus
(4) Cervix
Which germ layer gives rise to the nervous system?
(1) Ectoderm
(2) Mesoderm
(3) Endoderm
(4) Trophoblast
Which of the following best describes the blastula?
(1) A solid ball of cells
(2) A hollow ball of cells
(3) A three-layered structure
(4) A single cell
Which of the following best describes the function of the trophoblast?
(1) Forms the embryo
(2) Forms the placenta
(3) Forms the nervous system
(4) Forms the heart
Fill in the blank: The __________ is responsible for producing hormones such as hCG during early pregnancy.
Fill in the blank: The __________ is the first cell formed after fertilization.
Fill in the blank: The __________ is the first organ to function in the developing embryo.
Fill in the blank: The __________ is the structure that supplies nutrients to the developing embryo before the placenta is fully formed.
True or False: All vertebrates undergo similar stages of embryonic development.
True or False: Gastrulation is the process that leads to the formation of three germ layers.
True or False: The chorion and amnion are both extraembryonic membranes.
True or False: The mesoderm gives rise to muscles, bones, and the circulatory system.
