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Biology for IGCSE & O level - Reproduction (Section 6)

1
In flowering plants, where does fertilization occur?
Answer
(B)
In the ovule
2
In a flower, what is the function of the stigma?
Answer
(B)
To receive pollen
3
Which of the following statements correctly describes the main advantage of asexual reproduction?
Answer
(B)
It produces offspring that are identical to the parent.
4
What is the role of the petals in flowers?
Answer
(B)
Attract pollinators
5
Which hormone, secreted by the pituitary gland, triggers ovulation?
Answer
(B)
LH
6
In the context of plants, which part is responsible for the transfer of pollen grains?
Answer
(A)
Anther
7
Which of the following is essential for seed germination?
Answer
(C)
Water
8
Which part of the female reproductive system produces eggs?
Answer
(B)
Ovaries
9
What is the role of the cervix?
Answer
(C)
To allow the passage of menstrual flow and a baby.
10
Which of the following are effects of testosterone in males during puberty?
Answer
B
C
D
11
What is the female gamete in a flower called?
Answer
(B)
Ovule
12
What is the primary function of the style in a flower?
Answer
(C)
To connect the stigma to the ovary
13
What event signals the end of the follicular phase and the beginning of the luteal phase?
Answer
(B)
Ovulation
14
The thickening of the uterine lining in preparation for pregnancy is primarily caused by which hormone?
Answer
(C)
Estrogen
15
Which of the following is a characteristic of the luteal phase of the menstrual cycle?
Answer
(C)
Progesterone levels are high.
16
Which of the following hormones is primarily responsible for preparing the uterus for pregnancy?
Answer
(B)
Progesterone
17
What structure connects the ovary to the stigma?
Answer
(B)
Style
18
What is the main function of the yellow body (corpus luteum)?
Answer
(B)
To secrete progesterone to support the pregnancy.
19
What part of the flower receives the pollen?
Answer
(B)
Stigma
20
Which of the following is the correct order of events in sexual reproduction in plants?
Answer
(A)
Pollination -> Fertilization -> Seed formation -> Fruit development
21
What is the role of the anther?
Answer
(B)
To produce pollen.
22
During the secretory phase of the menstrual cycle, what happens in the uterus?
Answer
(B)
The uterine lining thickens and becomes more vascular.
23
Which of the following is a difference between sperm cells and egg cells?
Answer
(C)
Sperm cells carry less nutrients.
24
Which of the following events occurs during the first trimester of pregnancy?
Answer
(D)
All of the above
25
What is the primary function of the fruit?
Answer
(C)
To protect and disperse seeds
26
What is the function of the vagina in the female reproductive system?
Answer
(B)
To receive sperm
27
Which structure transports the sperm to the egg?
Answer
(B)
Fallopian tube
28
Which of the following hormones is released by the pituitary gland?
Answer
(C)
FSH
29
Which hormone is responsible for the development of secondary sexual characteristics in females?
Answer
(B)
Estrogen
30
What structure is responsible for containing the male gametes in a flower?
Answer
(C)
Anther
31
What is the primary function of the ovule?
Answer
(C)
To develop into a seed
32
In flowering plants, what is the male gamete?
Answer
(B)
Pollen Grain
33
What are the two main hormones secreted by the ovaries?
Answer
(B)
Estrogen and Progesterone
34
What is the primary function of the endosperm within a seed?
Answer
(B)
Food storage for the embryo
35
Which floral part is typically the most colorful and helps in attracting pollinators?
Answer
(B)
Petal
36
Where is the sperm produced in the male reproductive system?
Answer
(C)
Testes
37
Which floral part is modified into a fruit?
Answer
(B)
Ovary
38
What part of a seed provides food for the developing embryo?
Answer
(C)
Endosperm
39
Which of the following is a characteristic of wind-pollinated flowers?
Answer
(D)
Small, inconspicuous flowers
40
What is the main function of the fruit?
Answer
(B)
Protect and disperse seeds
41
Which of these is a secondary sex characteristic that appears in both males and females during puberty?
Answer
(C)
Growth spurts
42
What is the role of the stigma in pollination?
Answer
(B)
To receive pollen grains
43
Where does fertilization typically occur?
Answer
(C)
Fallopian tube (oviduct)
44
In the context of flowers, what is a 'perfect' flower?
Answer
(C)
A flower containing both male and female reproductive parts
45
What is the primary function of the placenta?
Answer
(C)
To facilitate the exchange of nutrients and waste between the mother and the fetus.
46
What is the role of testosterone in males?
Answer
A
B
47
What is the difference between asexual and sexual reproduction in terms of genetic material?
Answer
(B)
Asexual reproduction leads to offspring with the same genetic information as the parent, while sexual reproduction leads to genetic variation.
48
Which of the following statements describes the primary function of estrogen during the menstrual cycle?
Answer
(C)
Thickens the uterine lining.
49
Which of the following is NOT a stage of the menstrual cycle?
Answer
(D)
Gestation phase
50
What is the primary role of the sepals in a flower?
Answer
(B)
To protect the developing bud