Standard Books Zoology Class 12 Questions

The transfer of sperms into female genital tract is called as ________.

During electrophoresis, DNA fragments move towards the

Choose the wrong statement regarding AIDS

Improved programmes covering wider reproduction related areas are currently in operation under the popular name _______ programmes

Abiogenesis means

The linking of antibiotic resistance gene with the plasmid vector became possible with

When an organ is transplanted and is rejected by the body, the lymphocytes are produced by

About how long ago was the earth formed

Which of the following is true about RNAi process?

Which of the following is an accessory reproductive gland in male mammals?

Biotechnology deals with techniques of

The term 'Health' is defined in many ways. The most accurate definition of the health would be

The “family planning” were initiated in ________.

What is true for primitive atmosphere?

It is now possible to breed plants and animals with desired characters through

How many recombinant products are presently being marketed in India?

Which cells in the testes secrete testosterone, the male sex hormone?

Which of the following is not used as a bioweapon?

Statutory raising marriageable age of female to _____ and that of males ______ giving incentives to small family could tackle population explosion

Statutory ban on _______ for sex-determination to legally check increasing menace of female foeticides, massive child immunisation, etc.

Which of the following are the two key concepts of Darwinian theory of evolution?

A widely used diagnostic test for AIDS is

Cancer is generally caused due to the activation/conversion of ________ to ________ and/or inactivation of ________.

Which one of the following is not a disorder of bone?

Pro-insulin contains

Child death may occur in the marriage of

HIV virus affects in AIDS patient

The shared terminal duct of the reproductive and urinary system in the human male is

PCR is used in the detection of

Match the type of immunity listed in column I with the examples listed in column II. Choose the answer that gives the correct combination of alphabets of the two columns

Which of the following is not a sexually transmitted disease

Which of the following is used as probe?

In the immune system, interferons are a part of

What happens during fertilisation in humans after many sperms reach close to the ovum

The immunoglobulin abundant in colostrum is Or Which-yellowish fluid colostrum has abundant antibody to protect the infant

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

How many varieties of rice have been estimated to be present in India?

_______ is one such method in which the couples avoid or abstain from coitus from day _______ of the menstrual cycle when ovulation could be expected

Lymphoid tissue also located within the lining of the major tracts (respiratory, digestive and urogenital tracts) called ________.

The factors involved in the formation of new species are:

Select the correct sequence for transport of sperm cells in male reproductive system

Crystals of Bt-toxin produced by some bacteria do not kill the bacteria themselves because

We can cut DNA with the help of

Ovulation in mammals is caused by

Which of the following is not a lymphoid tissue

_______ is another method in which the male partner withdraws his penis from the vagina just before ejaculation so as to avoid insemination.

Which of the following statement is incorrect?

Read the following statements and choose the correct option

A. Increase in melanized moths after industrialization in Great Britain is a proof for natural selection

B. When more individuals of a population acquire a mean character value, it is called disruption

C. Changes in allelic frequency in a population will lead to Hardy Weinberg equilibrium

D. Genetic drift changes the existing gene or allelic frequency in future generations

Which of the following sexually transmitted diseases is not completely curable

The extraction of DNA from a gel piece is known as