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

Identify the hormone releasing IUDs -

Observe the figures and answer the question.

The bacteria which grow anaerobically on cellulosic material present in the digester tank of bio-gas plant is.

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:

Match List I with List II.

LIST I	LIST II
A. Epidermophyton sp.	I. Typhoid
B. Haemophilus influenzae	II. Elephantiasis
C. Wuchereria malayi	III. Ringworm
D. Salmonella sp.	IV. Pneumonia

Choose the correct answer from the options given below:

Read the paragraph given below and answer the question.
Sutton and Boveri argued that the pairing and separation of a pair of chromosomes would lead to the segregation of a pair of factors they carried. Sutton united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritance. Following this synthesis of ideas, experimental verification of the chromosomal theory of inheritance by Thomas Hunt Morgan and his colleagues, led to discovering the basis for the variation that sexual reproduction produced. Morgan worked with the tiny fruit files, which were found very suitable for such studies. They could be grown on simple synthetic medium in the laboratory. They complete their life cycle in a short span of time and a single mating could produce a large number of progeny flies. Also, there was a clear differentiation of the sexes the male and female flies are easily distinguishable. Also, it has many types of hereditary variations that can be seen with low power microscopes.
Which statement is incorrect with respect to Drosophila.

Arrange the following PCR steps in the correct sequence.
A. Extension of Primers
B. Amplification of DNA
C. Annealing of Primers
D. Denaturation of DNA fragment
Choose the correct answer from the options given below:

When copper and germanium are cooled from room temperature to 100 K, then :

The value of \(\int\left(\sqrt{x}+\frac{1}{\sqrt{x}}\right)^2 d x\) is:

Name the reaction by which Freons 12 are manufactured

If \(y=\log \left[\frac{x^2}{e^2}\right]\) then value of \(\frac{d^2 y}{d x^2}\) is :

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.
Heroine (Smack) which is extracted from the latex of poppy plant is chemically called:

A magnet suspended freely at the Equator will set itself _______ to the surface of Earth, while one suspended at pole will stand ________.