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Biology 12 Chapter 21
Development and Aging - 16
1.
Umbilical arteries transports……………..blood?
a) Oxygenated, nutrient-depleted
b) Deoxygenated, nutrient- rich
c) Oxygenated, nutrient-rich
d) Deoxygenated, nutrient-depleted
2.
Foetal heart pumps………………blood?
a) Oxygenated, nutrient-rich
b) Oxygenated, nutrient-depleted
c) Deoxygenated, nutrient-depleted
d) Deoxygenated, nutrient- rich
3.
Foetuses of different types are called…………..?
a) Quadruplets
b) Twins
c) Triplets
d) Fraternal
4.
Identical twins are also called…………….?
a) Multiple zygotic
b) Monozygotic
c) Dizygotic
d) None of them
5.
How many eggs are fertilized by how many sperms to yield identical twins?
a) 2 eggs by 1 sperm
b) 1 egg by 1 sperm
c) 2 eggs by 2 sperms
d) 1 egg by 2 sperms
6.
How many eggs are fertilized by how many sperms to yield fraternal twins?
a) 2 eggs by 1 sperm
b) 1 egg by 1 sperm
c) 2 eggs by 2 sperms
d) 1 egg by 2 sperms
7.
Which is not common among identical twins?
a) All of them
b) Sex
c) Fingerprint
d) Blood group
8.
Which is correct regarding identical twins?
a) Having same hand fingerprint
b) Having same handedness
c) Having different blood group
d) Doesn’t look exactly alike
9.
Which is correct regarding identical twins?
a) Having different amniotic sacs
b) Having same placenta
c) All of them
d) Formed by 1 egg and 1 sperm
10.
Which is correct regarding fraternal twins?
a) Having different placentas
b) Formed by 2 eggs and 2 sperms
c) All of them
d) Having different amniotic sacs
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