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WorksheetsFORM 5 DEVELOPMENT OF ZYGOTE
Total questions: 18
Worksheet time: 9mins
When an ovum is first fertilized it is known as
a nucleus
an embryo
a zygote
a fetus
What structure protects and cushions the fetus throughout its prenatal development?
amniotic sac and fluid
placenta
umbilical cord
vagina
Which is the correct order?
embryo, foetus, zygote
foetus, zygote, embryo
embryo, zygote, foetus
zygote, embryo, foetus
Which foods should a woman AVOID during pregnancy?
raw shellfish
caffeine
raw or undercooked meat
deli meat (sandwich meat)
Which of the following consist of a hollow ball of cells
Gastrula
Morula
Blastocyst
State the no of chromosomes in a human zygote.
12
23
46
92
The diagram below represents some stages of early embryonic development. Which process is represented by the arrows in the diagram?
meiosis
Mitosis
Fertilization
Evolution
Which statement(s) correctly describe about structure X?
(Choose all that apply)
help to maintain a thick, blood-enriched endometrium throughout the pregnancy
exchange of nutrients from the mother to the foetus
exchange of wastes from mother to the foetus
Oxygen diffuses from fetal blood to maternal blood.
Which of the following twins form from the fertilisation of one sperm and one ovum?
Identical twins
Fraternal twins
Siamese twins
The embryos of the twins develop into two foetuses, each with its own placenta and umbilical cord.
The above description is true for
identical twins
fraternal twins
siamese twins
The above image is
identical twins
fraternal twins
siamese twins
Which of the following carry blood rich in carbon dioxide and nitrogenous waste products from the foetus to the placenta?
foetal artery
umbilical artery
umbilical vein
foetal vein
Sexual reproduction is vital to the propagation of the Human race. Which of the following sequences represents the correct order of events in the formation of a human fetus?
Zygote → Blastocyst → Embryo → Fertilization
Fertilization → Zygote → Blastocyst → Embryo
Blastocyst → Embryo → Differentiation → Zygote
Fertilization → Growth → Differentiation → Zygote
The main function of the placenta is to :
allow direct exchange of blood between the mother and fetus for nutrition.
facilitate gas and nutrient exchange between the fetus and mother.
support the weight of the developing fetus in the uterus.
store gases and nutrients for later delivery to the fetus.
