The eggs of the cuckoo (koel) have evolved to resemble crow's eggs in size and color. If the parasite bird has laid its eggs in the nest of host and lets the host to incubate them. This is an example of:

Arrange the following cells in correct sequence of oogenesis:
(A) Secondary oocyte
(B) Oogonia
(C) Primary oocyte
(D) Ovum
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.
'Coca alkaloids' are obtained from the plant-

Genetically modified crops have advantages over normal crops as they are:
(A) More tolerant to cold, drought, salt and heat
(B) Less efficient in mineral usage
(C) Less reliant on chemical pesticides
(D) Nutritionally enriched
Choose the correct answer from the options given below :

Which of the following is/are NOT the benefit of transgenic animal to man?
A. Chemical safety testing
B. Vaccine safety testing
C. Increasing the industrial product
D. Obtaining useful biological products
E. Study of diseases
Choose the correct answer from the options given below :

Identify the microbes producing commercially important organic acids and enzymes from the given options:
(A) Trichoderma polysporum
(B) Streptococcus
(C) Clostridium butylicum
(D) Aspergillus niger
Choose the correct answer from the options given below:

Identify the correct sequence of events for the technique of DNA fingerprinting.
(A) Hybridization using labelled VNTR probe, followed by detection of hybridized DNA fragments by autoradiography
(B) Transfer of separated DNA fragments to synthetic membranes, such as nitrocellulose or nylon
(C) Isolation and digestion of DNA by restriction endonucleases
(D) Separation of DNA fragments by electrophoresis
Choose the correct answer from the options given below:

Arrange the given steps of DNA fingerprinting in the sequence from initiation to end.
(A) Digestion of DNA by restriction endonuclease
(B) Isolation of DNA
(C) Hybridisation using labelled VNTR probe
(D) Transferring (blotting) of separated DNA fragments to synthetic membrane
Choose the correct answer from the options given below :

Which one of the following hormones is essential for maintenance of the endometrium?

The chemical composition of Tollens' reagent is

If \(\vec{a}, \vec{b}, \vec{c}\) are vectors such that \(\vec{a}+\vec{b}+\vec{c}=\overrightarrow{0}\) and \(|\vec{a}|=1,|\vec{b}|=2,|\vec{c}|=5\), then the expression \(\vec{a} \cdot \vec{b}+\vec{b} \cdot \vec{c}+\vec{c} \cdot \vec{a}\) equals

Read the passage carefully and answer the given questions.
DNA Fingerprinting
Polymorphism in DNA sequence is the basis of genetic mapping of the human genome as well as of DNA fingerprinting. DNA fingerprinting involves identification of differences in some specific regions in the DNA sequence called repetitive DNA. It works on the principle of polymorphisms in DNA sequences. The repetitive DNA are separated from bulk genomic DNA. The bulk DNA forms a major peak and the other small peaks are referred to as satellite DNA. These repetitive/satellite DNA sequences show a high degree of polymorphisms and form the basis of DNA fingerprinting.
Which one of the following techniques is involved in DNA fingerprinting?

Which of the following hormone is responsible for the development of secondary female characteristic and participate in control of menstrual cycle?