Contraceptive oral pills help in birth control by

• killing the sperms in uterus

• preventing implantation

• preventing ovulation

• both (b) and (c)

In assisted reproductive technology where gametes have been fertilized in vitro, which of the following is practicable for embryo transplantation in Fallopian tube

• Only embryo up to 8 blastomeres if zygote is not transplanted.

• Only zygote is transplanted not embryo

• Either embryo or zygote with 8 blastomere phase transplanted

• Morulla with 8-24 celled stage is transplanted in Fallopian tube.

43.

Which one of the following pairs is not correctly matched

• Streptomyces - Antibiotic

• Serratia - Drug addiction

• Spirulina - Single cell protein

• Rhizobium - Biofertilizer

Assertion : Amniocentesis is a process of foetal sex determination.

Reason : Metabolic errors and other diseases can be diagnosed prenatally by this process.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Women who consumed the drug thalidomide for relief from vomiting during early months of pregnancy gave birth to children with

• no spleen

• hare-lip

• extra fingers and toes

• underdeveloped limbs.

The crystal of lead zirconate is a key component of

• electroencephalography

• electrocardiography

• magnetoencephalography

• sonography

In a population, unrestricted reproductive capacity is called

• biotic potential

• fertility

• carrying capacity

• birth rate

Oral contraceptive pill is composed of

• oestrogen and progesterone

• oestrogen and testosterone

• progesterone and testosterone

• oestrogen and growth hormone

One of the legal methods of birth control is

• abortion by taking an appropriate medicine

• by abstaining from coitus from day 10-17 of the menstrual cycle

• by having coitus at the time of day break

• by a premature ejaculation during coitus

Which of the following cannot be detected in a developing foetus by amniocentesis?

• Klinefelter's syndrome

• Sex of the foetus

• Down's syndrome

• Jaundice