Multiple Choice QuestionsThe phase of menstrual cycle in humans that lasts for 7-8 days, is :
menstruation
luteal phase
ovulatory phase
follicular phase
A.
menstruation
The phase of menstrual cycle in humans which lasts for 7-8 days is menstruation. It is the destruction of the mucous membrane of the uterus and consequent bleeding, which occurs periodically in humans.
Luteal phase is a stage of menstrual cycle which occurs after ovulation and before beginning of menses.
Ovulatory phase or ovulation is the midpoint of the menstrual cycle. It starts about 14 days after the follicular phase started.
the follicular phase starts on the first day of menstruation and ends with ovulation. During this phase, FSH or Follicle Stimulating Hormone and LH or Luteinizing Hormone are released from the brain and travel in the blood to the ovaries.
Which one of the following statement with regard to the embryonic development in humans is correct ?
Cleavage results in a hollow balls of cells called morula
Cleavage in mammalian ova is unequal holoblastic and horizontal
Rearrangement of blastomeres, a central cavity is formed inside the morula
Cleavage bring about considerable increase in the mass of protoplasm
Which of the following is not immunised by triple antigen ?
Typhoid
Tetanus
Diptheria
Whooping cough
A person with the sex chromosomes XXY suffers from :
Down's syndrome
Turner's syndrome
Gynandromorphism
Klinefelter's syndrome
Reproducing new plants by cells, instead of seeds, is known as :
Mutation
antibiotics
biofertilizer
tissue culture
Creosote is used to prevent:
rusts of wheat
dry rot of wood
loose smut of oats
brown rust of barley
Which of the following insecticide is obtained from the roots of Derris elliptica ?
Cinerin
Nicotine
Rotenone
Pyrethrum
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