The rate of biomass production is expressed in terms of __________ to compare the productivity of different ecosystems.

Which of the following factors can influence Hardy-Weinberg equilibrium?

Oral contraceptive pills used by females, function through:

Which of the followings are the side effects of the usage of anabolic steroids in females?
(A) Deepening of voice
(B) Increased aggressiveness
(C) Mood swings
(D) Abnormal menstrual cycle
Choose the correct answer from the options given below:

In organisms, the same structure developed along different directions due to adaptations to different needs. This refers to:

Read the passage carefully and answer the questions based on the passage:
Species diversity on earth is not uniformly distributed. It is generally highest in the tropics and decreases towards the poles. Earth's fossil history reveals the incidences of mass extinctions in the past. Earth's rich biodiversity is vital for the very survival of mankind. It is believed that communities with high diversity tend to be less variable and more productive. The reasons of conserving biodiversity are narrowly utilitarian, broadly utilitarian and ethical. Biodiversity conservation may be in-situ as well as ex-situ.
Which one of the following does not exhibit narrowly utilitarian argument for conserving biodiversity?

Match List I with List II.

LIST I	LIST II
A. Agrobacterium tumifaciens	I. Join foreign DNA to plasmid
B. Thermus aquaticus	II. First recombinant DNA
C. Plasmid of Salmonella	III. Thermostable DNA polymerase
D. Ligase	IV. Ti Plasmid

Choose the correct answer from the options given below:

The correct sequence of the formation of pollen grains is -
(A) Sporogenous tissue
(B) Formation of microspore
(C) Microspore tetrad formed by meiotic divisions
(D) Pollen grains develop from microspores
Choose the correct answer from the options given below

Which one of the following regions is not present in transcriptional unit of DNA

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 :

Match List - I with List - II.

List - I	List - II
(A) Opioids	(I) Erythroxylum coca
(B) Heroin	(II) Tobacco
(C) Cocaine	(III) Papaver somniferum
(D) Nicotine	(IV) Diacetyl morphine

Choose the correct answer from the options given below :

Any function \(f(x)\) is an increasing function in \([a, b]\) if:
(A) \(\forall x_1, x_2 \in[a, b], f\left(x_1\right) \geq f\left(x_2\right)\) if \(x_1 < x_2\)
(B) \(\forall x_1, x_2 \in[a, b], f\left(x_1\right) \geq f\left(x_2\right)\) if \(x_1 > x_2\)
(C) \(\forall x_1, x_2 \in[a, b], f\left(x_1\right) \leq f\left(x_2\right)\) if \(x_1 < x_2\)
(D) \(\forall x_1, x_2 \in[a, b], f\left(x_1\right) < f\left(x_2\right)\) if \(x_1 > x_2\)
Choose the correct answer from the options given below :

The number of moles of hydrogen oxidized in the oxidation of 67.2 L of H 2 at STP is: