Identify the correct combination of intra uterine devices.
(A) Lippes loop
(B) LNG-20
(C) Saheli
(D) Multiload 375
Choose the correct answer from the options given below:

The rate of formation of new organic matter by consumers in termed as:-

Match List-l with List-II

List l (Habitat)	List-II (Animal)
(A) Sunderbans	(I) Lion
(B) Periyar	(II) Wild ass
(C) Rann of Kutch	(III) Bengal tiger
(D) Gir	(IV) Elephant

Choose the correct answer from the options given below:

Identify the cry gene that controls corn borer.

Identify the correct statements for pollen grains
(A) Pollen grain represents male gametophyte.
(B) Pollen grain is a haploid unicellular body.
(C) The hard exine of the pollen is made up of sporopollenin.
(D) The intine of the pollen is composed of oxidative polymers of
carotenoids or carotenoid esters.
Choose the correct answer from the options given below:

Read the following passage carefully.
Restriction enzyme
Restriction enzymes cut the strand of DNA a little away from the center of the palindrome sites, but between the same two bases on the opposite strands. This leaves single stranded portions at the ends. There are overhanging stretches called sticky ends on each strand. These are named so because they form hydrogen bonds with their complementary cut counterparts. This stickiness of the ends facilitates the action of the enzyme DNA ligase. The word palindromes refer to group of letters that forms the same words when read both forward and backward. Restriction endonucleases are used in genetic engineering as molecular scissors.
Which bond forms on sticky end of each strand?

Histones are rich in amino acids -

3 A double convex lens made of glass of refractive index has both radii of curvature of magnitude 20 cm. An object 3 cm high is placed at 10 cm from the lens. What is the nature and size of the image ?

Which substance is produced by a cell in viral infection that protect other cells from further infection?

The presence of which disease is confirmed by Widal Test?

The general solution of the differential equation \(x d y+\left(y-e^x\right) d x=0\) is :
where C is constant of integration

If the events A and B are independent, then which of the following statements are true?
(A) \(P\left(A^{\prime} \cap B\right)=[1-P(A)] P(B)\)
(B) A and B are mutually exclusive
(C) P(A) = P(B)
(D) \(P\left(A^{\prime} \cap B^{\prime}\right)=[1-P(A)][1-P(B)]\)
Choose the correct answer from the options given below:

Read the passage carefully and answer the Questions:
According to Valence Bond theory, the metal atom or ion under the influence of ligands can use its (n - 1)d, ns, np or ns, np, nd orbitals for hybridisation to yield a set of equivalent orbitals of definite geometry such as octahedral, tetrahedral, square planar and so on. These hybridised orbitals are allowed to overlap with ligand orbitals that can donate electron pairs for bonding. While the VB theory, to a larger extent, explains the formation, structures and magnetic behaviour of coordination compounds, it suffers from the many shortcomings. The Crystal field theory (CFT) is an electrostatic model which considers the metal-ligand bond to be ionic arising purely from electrostatic interactions between the metal ion and the ligand. The five d orbitals in an isolated gaseous metal atom/ion have same energy, i.e., they are degenerate. This degeneracy is maintained if a spherically symmetrical field of negative charges surrounds the metal atom/ion. However, when this negative field is due to ligands in a complex, it becomes asymmetrical and the degeneracy of the d orbitals is lifted. It results in splitting of the d orbitals. The pattern of splitting depends upon the nature of the crystal field.
Which of the following represents the correct pair?