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WorksheetsQuiz 9: Topic 9 - Reproduction and Development
Total questions: 28
Worksheet time: 16mins
Which of the following undergoes meiosis in the development of pollen grains?
Microspore
Megaspore
Megaspore mother cell
Microspore mother cell
In angiosperms, sperms are formed by
meiosis in the anther.
meiosis in the pollen grain.
mitosis in the anther.
mitosis in the pollen tube.
Pollination occurs when…….
pollen is transferred from the male to the female parts of flowers.
one of the male nuclei fuses with the egg cell to give rise to the zygote.
dispersal of the progeny to gain a foothold in new localities.
the seeds resume growth after dormancy.
Which statement about the megasporocyte is TRUE?
It undergoes meiosis to produce three haploid cells.
It is a diploid cell located within an ovule.
It divides mitotically to form a male gametophyte.
It plays an important role in cross-pollination.
In angiosperms, meiosis occurs in the ______________, producing a spore that develops into a female gametophyte.
anther
seed
ovary
fruit
In flowering plants, fertilization takes place in the
Style
Micropyle
Pollen tube
Embryo sac
Following double fertilization, the ovule develops into ___________ and the ovary develop into _____________.
a cotyledon, an embryo
an embryo, a seed
a seed, a fruit
a fruit, a seed
In spermatogenesis, the primordial germ cells undergo differentiation to form
spermatids.
sperms.
diploid spermatogonia.
haploid spermatogonia.
In males, gonadotropin – releasing hormone stimulates the _________ to secrete _______________ .
Anterior pituitary; inhibin.
Anterior pituitary; FSH and LH.
Anterior pituitary; testosterone.
Posterior pituitary; FSH and LH.
The following statements are TRUE about the function of Sertoli cell except ….
control the release of sperm into the lumen of seminiferous tubules.
removes the degenerating spermatogenic cells by phagocytosis.
nourishes all spermatogenic cells.
secretes testosterone hormone.
Arrange the following stages of oogenesis in sequential order.
1. Secondary oocyte
2. Oogonium
3. Ovum
4. Primary oocyte
4 → 1→ 2 → 3
4 → 3 → 2 → 1
3 → 2 → 4 → 1
2 → 4 → 1 → 3
Granulosa cells surround a _______________________.
primary oocyte.
secondary oocyte.
primary spermatocyte.
secondary spermatocyte.
What are the phases of the ovarian cycle?
Menstrual, ovulation and luteal.
Follicular, ovulation and luteal.
Menstrual, proliferative and secretory.
Follicular and luteal.
Which of the following hormones stimulates ovulation and the development of the corpus luteum?
Estrogen
Progesterone
Luteinizing hormone
Follicle stimulating hormone
The function of corpus luteum is to
nourish and protect the egg cell.
produce progesterone and estrogen.
maintain pregnancy by production of human chorionic gonadotropin.
produce prolactin in the milk sacs of the mammary gland.
During an acrosome reaction, the acrosome ...
Detaches, allowing the sperm to penetrate the egg.
Releases enzyme that digest the outer layer of the egg.
Secretes calcium ions, which cause the sperm to fuse with the egg.
Releases inhibin, which causes the sperm to bind to the egg.
How does the secondary oocyte prevent the penetration of more than one sperm?
Penetration of a sperm to secondary oocyte induces the zona pellucida to become harden and thicken.
Forms barrier to other sperms.
Avoid depolarisation of secondary oocyte’s plasma membrane.
Promote fast and slow block to polyspermy.
Why is it important that only one sperm enters the secondary oocyte?
To maintain the diploid condition with 2 sets of chromosomes (2n)
Fertilisation by several sperms will cause polyploidy which is fatal to human.
To avoid genetic variation.
To control activities in the cell.
What is the function of the chorion?
To absorb shock in case of fall
To form blood cells
To provide nourishment for the fetus
To permit gas exchange
Name the structure that secretes human chorionic gonadotrophin hormone.
Ovary
Trophoblast cells
Corpus luteum
Endometrium walls
When is a human embryo known as a fetus?
After 4 weeks
After 8 weeks
After 10 weeks
After 12 weeks
The heart, muscles, bones and blood develop primarily from
ectoderm.
mesoderm.
endoderm.
the placenta.
Select the CORRECT sequence of animal developmental events.
fertilization --> cleavage --> gastrula --> blastocyst
fertilization --> cleavage --> blastocyst--> gastrula
fertilization --> blastocyst --> cleavage --> gastrula
fertilization --> gastrula --> blastocyst --> cleavage
Which of the following consist of a hollow ball of cells?
Gastrula
Morula
Blastocyst
Blastocoel
Which of the following statements is NOT TRUE about hormonal control during birth in humans?
The release of the prostaglandin hormone from the placenta is increased.
The level of progesterone in the blood is higher than that of estrogen.
The anterior lobe of the pituitary gland secretes prolactin.
The posterior lobe of the pituitary gland secretes oxytocin.
Which of the following hormones inhibits contraction of the uterus?
Cortisol
Oxytocin
Prostaglandin
Progesterone
Which of the following hormones is CORRECTLY paired with its function?
Prolactin – stimulates breast development at puberty
Oxytocin – stimulates uterine contractions during parturition
Luteinizing hormone – responsible for follicle development in an ovarian cycle
Progesterone – repairment of uterus endometrial wall
Fetus is very active
Fetal movement may be visible through abdominal wall
Level of hCG hormone decline
The corpus luteum deteriorate
Placenta secretes progesterone
The statements above show that the fetus is in _____________ stage.
trimester I
trimester II
trimester III
final trimester
