Identify the terminal methods to prevent pregnancy.
(A) Tubectomy
(B) Vasectomy
(C) IUDs
(D) Cervical caps
Choose the correct answer from the options given below:

The arrangement of the nuclei in a normal embryo sac from the chalazal to micropylar end in dicots is -

ELISA is based on the principle of -

The interaction between two species where one species is benefitted and the other is neither benefitted nor harmed is known as:

Which one of the following is a correct statement about dormancy?

Read the following passage carefully and answer the given questions.
The B-lymphocytes produce an army of proteins in response to pathogens. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy.
Lymphoid organs are the organs where origin and/or maturation and proliferation of lymphocytes occur. The primary lymphoid organs are bone marrow and thymus. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. Heroin commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine, which is extracted from the latex of poppy plant Papaver somniferum.
Which one of the following organs is not a secondary lymphoid organ in humans?

Which of the following steps are included to make a healthy society?
(A) Aware the people to uncontrolled population growth
(B) Aware the people to social evil like sex abuse
(C) Aware the people to sex related crime
(D) The Peoples lead to increase the mortality rate of mother and infant
Choose the correct answer from the options given below:

A container contains 50 litres of milk. From this container 10 litres of milk was taken out and replaced by water. This process is repeated two more times. How much milk is now left in the container?

Which of the following are autosomal recessive trait/ disorder?
(A) Thalassemia
(B) Haemophilia
(C) Sickle cell anaemia
(D) Phenylketonuria
Choose the correct answer from the options given below:

DNA fingerprinting is used for:
(A) Forensic Laboratories for identification of criminals
(B) To identify paternity of an individual
(C) To identify the dead bodies by comparing the DNA of parents or children
(D) To identify racial groups, to rewrite biological evaluations.
Choose the correct answer from the options given below:

Given :
\(\begin{array}{l}
E_{K^{+} / K}^{\circ}=-2.93 V \\
E_{Ag^{+} / Ag}^{\circ}=0.80 V \\
E_{Hg^{2+} / Hg}^{\circ}=0.79 V \\
E_{Mg^{2+} / Mg^{-}}^{\circ}=-2.37 V \\
E_{Cr^{3+} / Gr}^{\circ}=-0.74 V
\end{array}\)
Choose the correct order :
(A) \(Ag < Hg < Cr < Mg < K\) (increasing reducing power)
(B) \(Ag < Hg < Cr < Mg < K\) (decreasing oxidising power)
(C) \(Ag > Hg > Cr > Mg > K\) (decreasing oxidising power)
(D) \(Hg > Cr > Ag > K > Mg\) (increasing reactivity )
(E) \(K > Mg > Cr > Hg > Ag\) (decreasing reactivity order)
Choose the correct answer from the options given below :

Jawless fish probably evolved around:

A parallel plate capacitor whose capacitance C is 13.0 pF is charged by a battery to a potential difference V = 13.0 V between its plates. What is the potential energy of the capacitor ?