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WorksheetsPRE-TEST TOPIC 9
Total questions: 10
Worksheet time: 9mins
After a pollen grain has reached the stigma, it travels through the __________ to reach the ovary.
style
stalk
stigma
stem
Which nucleus responsibles in the formation of sperm cell from the pollen grain?
Generative nucleus
Tube nucleus
Polar nuclei
Triploid nuclei
Which of the following structures labelled A, B, C and D is antipodal cells
A
B
C
D
Which of the following is fertilised during double fertilisation?
egg cell and two polar nuclei
egg cell and antipodal cells
egg cell and synergid cells
antipodal cells and synergid cells
Which hormone causes FSH and LH to be released?
Testesterone
Estrogen
GnRH
Progesterone
What is the role of LH during the menstrual cycle ?
inhibits the development of another follicle by inhibiting FSH
causes ovulation and the ruptured follicle to develop into corpus luteum
stimulates the growth of endometrium lining
stimulates the development of follicles, which in turn leads to estrogen secretion, which in turn inhibits FSH
Which of the following statements about hormone regulation of the female reproductive cycle is false?
LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries
Estrogen and progesterone secreted from the corpus luteum cause the endometrium to thicken
Both progesterone and estrogen are produced by the follicles
Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estrogen
What is the role of estrogen during the menstrual cycle?
Causes ovulation and causes the ruptured follicle to develop into a corpus luteum
It stimulates the growth of the endometrium lining, stimulating LH secretion
Stimulates the growth of the endometrium lining, but then inhibits LH & FSH
Stimulates the development of follicles which in turn leads to estrogen secretion
Which of the following is NOT an example of a negative feedback system?
Follicles secreting estrogen which then inhibits FSH
Progesterone increase after ovulation inhibiting FSH secretion
Estrogen levels increasing stimulating LH secretion
Estrogen levels decreasing inducing menstruation (menses)
