Match List-l with List-II

List-l (Male reproductive parts)	List-II (Functions)
(A) Leydig Cells	(I) Nutrition
(B) Hypothalamus	(II) FSH
(C) Sertoli cells	(III) Androgen
(D) Anterior pituitary	(IV) GnRH

Choose the correct answer from the options given below:

Which of the following is NOT a sexually transmitted disease?

Which one of the following infections is completely curable?

Observe the figure and answer the following:


Identify the true statements:
A. Stable genetic equilibrium results in evolution
B. Genetic equilibrium means the constant gene pool in population remains constant
C. In a given population one can find out the frequency of occurrence of alleles of a gene or a locus
D. The frequency of occurrence of alleles of a gene remain same through generations
Choose the correct answer from the options given below:

Read the following paragraph and answer the given questions.
Bio-fertilisers are organisms that enrich the nutrient quality of the soil like cyanobacteria, while there are organisms that help to control plant diseases and pests. The very familiar beetle, the ladybird and dragonflies are useful to get rid of aphids and mosquitoes, respectively. An example of microbial biocontrol agents that can be introduced to control butterfly caterpillars is certain bacteria, which are available in sachets in the form of dry spores. These spores are mixed with water and sprayed onto vulnerable plants. Trichoderma species that are very common in the root ecosystem, are very effective biocontrol agents of several plant pathogens.Baculoviruses attack insects and other arthropods. Usage of these viruses is desirable when an ecological sensitive area is being treated..
A farmer wants to get rid of aphids, but does not want to use insecticide, Choose the best option for him?

Identify the hormone, which is NOT produced during pregnancy in women.

Which one of the following expressions is used for comparing productivity of different ecosystems?

If \(e^x+e^y=e^{x+y}\), then \(\frac{d y}{d x}=\)

The energy of a Hydrogen atom in its first excited state is

If is equal to \(A=\left[\begin{array}{cc}3 & 1 \\ -1 & 2\end{array}\right]\), then \(A^2-5 A\) (where I is identity matrix of order 2)

Which of the following examples are based upon the total internal reflection of light?
(A) Optical fibre
(B) Twinkling of stars
(C) Mirage
(D) Sparkling of diamond
Choose the correct answer from the options given below:

Werner was the first to describe the bonding features in coordination compounds. But his theory could not answer basic questions like :
(i) Why only certain elements possess the remarkable property of forming coordination compounds ?
(ii) Why the bonds in coordination compounds have directional properties ?
(iii) Why coordination compounds have characteristics magnetic and optical properties ?Many approaches have been put forth to explain the nature of bonding in coordination compounds viz. Valence Bond Theory (VBT), Crystal Field Theory (CFT), Ligand Field Theory (LFT) and Molecular Orbital Theory (MOT).
We shall focus our attention on elementary treatment of the application of VBT and CFT to coordination compounds.
According to this 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.
Predict the shape of \(\left[ Ni ( CO )_4\right]\) on the basis of VBT :