Process of formation of new species due to change in allele frequency in a population is called:

How many haploid cells will be formed after first meiotic division of one primary spermatocyte ?

Which disease is not the sexually transmitted infection?

Arrange the given steps involved in Polymerase Chain Reaction in correct sequence?
(A) Annealing
(B) Extension
(C) Denaturation
(D) Amplification
Choose the correct answer from the options given below:

Which of the following plant is pollinated by insects?

Match List - I with List - II.

List - I	List - II
(A) RNA Polymerase II	(II) hn RNA
(B) RNA Polymerase I	(I) 28 srRNA
(C) Ribosome	(III) 5 srRNA
(D) RNA Polymerase III	(IV) 23 srRNA in bacteria

Choose the correct answer from the options given below :

Read the following paragraph and answer the given questions:
DRUGS AND ALCOHOL ABUSE
The drugs, commonly abused are opioids, cannabinoids, and coca alkaloids. Opioids are the drugs, which bind to specific opioid receptors present in our central nervous system and gastrointestinal tract. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. Cannabinoids are a group of chemicals, which interact with cannabinoid receptors present principally in the brain. Natural cannabinoids are obtained from the inflorescences of the plant Cannabis sativa. The flower tops, leaves and the resin of cannabis plant are used in various combinations to produce marijuana, hashish, charas and ganja. Generally taken by inhalation and oral ingestion, these are known for their effects on cardiovascular system of the body. It interferes with the transport of the neuro-transmitter dopamine. Cocaine, commonly called coke or crack is usually snorted. It has a potent stimulating action on central nervous system, producing a sense of euphoria and increased energy. Excessive dosage of cocaine causes hallucinations. Other well-known plants with hallucinogenic properties are Atropa belladona and Datura. These days cannabinoids are also being abused by some sportspersons. Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused. Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery. Several plants, fruits and seeds having hallucinogenic properties have been used for hundreds of years in folk-medicine, religious ceremonies and rituals all over the globe.
Which one of the following drugs is known for its effects on the cardiovascular system of the body?

Wildlife safari parks are example of-

Read the passage carefully and answer the given questions.
Recombinant DNA Technology
Asexual reproduction preserves the genetic information, while sexual reproduction permits variation. Traditional hybridization procedures used in plants and animals breeding very often lead to inclusion and multiplication of undesirable genes along with the desired genes. The techniques of genetic engineering, which include creation of recombinant DNA, use of gene cloning and gene transfer, overcome this limitation and allow us to isolate and introduce only one or a set of desirable genes without introducing genes into the target organism.
Which one of the following options is correct for working of restriction enzymes?

If \(y=\frac{\log x}{x^2}\), then find \(\frac{d^2 y}{d x^2}\).

The relation \(R\) on the set \(A\) of points in a plane, given by \(R=\{(P, Q)\) : Distance of the point \(P\) from the origin is same as the distance of

If \(\theta\) is an acute angle and the vector \(\vec{a}=(\sin \theta) \hat{i}+(\cos \theta) \hat{j}\) is perpendicular to the vector \(\vec{b}=\hat{i}-\sqrt{3} \hat{j}\) then \(\theta\) is equal to:

The carbylamine reaction is used as a test for