12. (a) (i) Name the two main types of reproduction - Leaving Cert Biology - Question 12 - 2017
Question 12
12. (a) (i) Name the two main types of reproduction.
(ii) Which type of reproduction occurs in humans?
(b) The diagram shows the human female reproductive system.... show full transcript
Worked Solution & Example Answer:12. (a) (i) Name the two main types of reproduction - Leaving Cert Biology - Question 12 - 2017
Step 1
Name the two main types of reproduction.
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Answer
The two main types of reproduction are asexual and sexual reproduction.
Step 2
Which type of reproduction occurs in humans?
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Answer
Humans reproduce through sexual reproduction.
Step 3
Name the parts labelled A, B, C, D, E.
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Answer
The parts labelled are:
A: Vagina
B: Uterus (womb)
C: Ovary
D: Oviduct (Fallopian tube)
E: Endometrium (womb lining)
Step 4
State one function of the part labelled C in the diagram.
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The function of part C (Ovary) is to produce eggs or to produce hormones (or named hormone).
Step 5
In which labelled part does fertilisation usually occur?
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Fertilisation usually occurs in the D (oviduct).
Step 6
What is meant by the term contraception?
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Contraception refers to the prevention of fertilisation or prevention of pregnancy.
Step 7
Give one method of contraception.
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One method of contraception is the Pill or condom.
Step 8
How long does an average human pregnancy last?
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An average human pregnancy lasts approximately nine months or 38-40 weeks.
Step 9
Birth takes place in three stages. Describe what happens at each stage.
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Answer
Stage 1: Contractions begin or waters break as the cervix dilates.
Stage 2: The baby is born through the vagina.
Stage 3: The placenta is expelled through the vagina.
Step 10
What happens to the level of progesterone at birth?
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The level of progesterone falls at birth.
Step 11
What effect has oxytocin on the muscles of the wall of the womb?
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Oxytocin causes the muscles to contract.
Step 12
What hormone controls the production of milk in humans?
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The hormone that controls the production of milk in humans is Prolactin.
Step 13
Suggest one reason why colostrum is important for new-born babies.
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Colostrum is important for new-born babies because it is rich in proteins (or fat) or contains rich antibodies and minerals.
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