Pre Embryonic development
A. Birth to 20 yrs
B. 28 days of birth to 25 yrs
C. Conception to 22yrs
D. Birth to 25 yrs
ANSWER – D.
D. Birth to 25 yrs
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The period of development from fertilization to birth is termed prenatal development.
The development of an individual continues after birth up to the age of 25 years.
This period of development is termed postnatal development.
A. Degeneration
B. Apoptosis
C. Migration
D. Fertilization
ANSWER – A.
A. Degeneration
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Prenatal growth involves a process called morphogenesis, which includes cell division, transformation or specialization, migration, and even programmed cell death (apoptosis).
During morphogenesis, genetic or environmental factors may affect the normal development of baby and cause congenital anomalies. Degeneration is a process of cell death by wear and tear which occurs in the postnatal period.
A. Fertilisation to beginning of eighth week
B. Implantation to end of eighth week
C. Zygote to ninth week
D. Fertilization to end of eighth week
ANSWER – D.
D. Fertilization to end of eighth week
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A. Fertilisation to beginning of eighth week
B. Implantation to end of eighth week
C. Zygote to ninth week
A. Pre-embryonic period
B. Embryonic period
C. Fetal period
D. Starts from implantation
ANSWER – B.
B. Embryonic period
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Formation of placenta, umbilical cord, and extraembryonic membranes and Differentiation of germ layers into specific body organs occurs in the Embryonic period.
A. Embryonic stem cells
B. Somatic cell
C. Bone marrow cells
D. Chorionic Villi cells
ANSWER – B.
B. Somatic cell
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Dolly the sheep, was cloned in 1997 by using the technique of somatic cell nuclear transfer.
A. Zygote
B. 8 cell Embryo
C. Morula
D. Blastocyst
ANSWER – C.
C. Morula
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Morula is a solid ball of 12–32 cells (blastomeres), it is formed 3–4 days after fertilization, just at
the time when the embryo enters the uterus.
A. known as the germinal phase
B. shortest phase of embryonic development
C. lasts from fertilization to the second week of the embryo’s life
D. gastrulation occurs in this phase
ANSWER – D.
D. gastrulation occurs in this phase
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Pre-embryonic period- lasts from fertilization to the second week of the embryo’s life.
Embryonic period: what the embryo looks like until it becomes a fetus
From the third week of gestation, gastrulation occurs, a process by which the embryo acquires its three germ layers.
Gastrulation is the stage in the early embryonic development during which the blastocyst is reorganized into a multilayered structure known as the gastrula.
Gastrulation occurs during week 3 of human development. The process of gastrulation generates the three primary germ layers (ectoderm, endoderm, mesoderm)
