Identify the practices followed to avoid sexually transmitted infection
A. Avoiding sex with unknown partners/multiple partners
B. Using condom during coitus
C. Periodic Abstinence
D. Insertion of copper-T in the uterus
Choose the correct answer from the option given below:

Which of the following statements are true about phosphorous cycle?
A. There is no respiratory release of phosphorus in the atmosphere
B. The reservoir of phosphorus is rock
C. There are large atmospheric inputs of phosphorus through rainfall
D. The gaseous exchange of phosphorus between organisms and environment is negligible
Choose the correct answer from the options given below:

In RNAi, the genes are silenced by the formation of:

Read the passage carefully. Attempt the questions.
An overwhelming majority (99 per cent) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids change with that of the ambient air and water osmotic concentration. These animals and plants are simply conformers. Considering the benefits of a constant internal environment to the organism, we must ask why these conformers had not evolved to become regulators. Recall the human analogy we used above; much as they like, how many people can really afford an air conditioner? Many simply 'sweat it out' and resign themselves to suboptimal performance in hot summer months. Very small animals are rarely found in polar regions. During the course of evolution, the costs and benefits of maintainin a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform.
If the stressful external conditions are localised or remain only for a short duration, the organism has five other alternatives for survival.
Identify the set of aquatic animals whose osmotic concentration is not constant.

Which one of the following statements is incorrect about ecological pyramids?

Somaclones are:

Which of the following enzymes join the sticky ends in recombinant DNA technology?

Let \(\vec{a}\) and \(\vec{b}\) be two unit vectors and \(\theta\) is the angle between them. If \(\vec{a}+\vec{b}\) is a unit vector, then \(\theta\) is:

In \(\left[ Ni ( en )_3\right] Cl _2\), the geometry of Ni is:

Let E and F are events associated with an experiment. If \(P(E)=0.4, P(F)=0.8\) and \(P(F \mid E)=0.6\) then \(P(E \mid F)\) is:

The value of k for which \(k \frac{d y}{d x}=\sqrt{x}-\frac{1}{\sqrt{x}}\), where \(y=\sqrt{x}+\frac{1}{\sqrt{x}}\); is :

If the objective function for an L.P.P. is \(z=3 x-4 y\) and the corner points for the bounded feasible region are \((0,0),(5,0),(6,5),(6,8),(4,10)\) and \((0,8)\), then the minimum value of \(z\) occurs at :

The sickle cell anaemia is a