In humans, the stage of growth in a young person when the reproductive organs become functional is called
Adulthood
Fertilization
Ovulation
Puberty
A woman receives X chromosomes from:
Her mother only.
Her father only.
Both from her mother and her father.
Extra nuclear DNA in her mother's egg.
The stage of development between fertilized egg and newly formed baby is
Zygote
Embryo
Fetus
Bud
How long does it take for a fertilized human egg to develop into a baby?
Three months
Six months
Nine months
Twelve months
Indicate which of the following sentences are true.i) The first menstrual cycle is called menarche.ii) Menopause occurs in the female at the age of 45-50 years.iii) Vagina of female reproductive system is a primary sex organ.iv) Breast is the accessory sex character.
i,ii and iii only
i,ii and iv only
ii, iii and iv only
i and ii only
Which of the following statements about reproduction are true?i) Oviparous animals give birth to young ones.ii) External fertilization takes place in frog.iii) An embryo is made up of a single cell.iv) Amoeba reproduces by binary fission.v) A zygote is formed as a result of fertilization.
i, ii and v only.
ii, iv and v only.
i and ii only.
All of the statements.
Which one of the following events is correctly matched with the time period of the normal menstrual cycle?
Release of ovum- 5th day.
Endometrium regenerates 5-10 days.
Endometrium secretes nutrients for implantation- 11- 18 days.
Rise in progesterone level 1 -15 days.
Which one of the following is not formed from mesoderm?
Blood
Bones and cartilage
Kidneys
Nervous system
Which of the following is an oviparous animal?
Blue whale.
Cat.
Rabbit.
Crow.
Which of the following is the reproductive method of hydra?
Fission.
Budding.
Sexual reproduction.
Sporulation.