Which one of the following is not the invasive alien species?

The historic convention on Biological Diversity ('The Earth Summit') held in 1992.

Read the given passage and answer the following questions:
Secondary treatment or biological treatment: The primary effluent is passed into large tanks where air is pumped into it. This allows vigorous growth of aerobic microbes. While growing, these microbes consume the major part of the organic matter in the effluent. This significantly change the BOD (biochemical oxygen demand) of the effluent. The effluent in then passed into a tank a small part of the sludge is pumped back into the aeration tank to serve as the inoculum. The remaining major part of the sludge is pumped into large tanks called sludge digesters. Here, other kinds of bacteria grow anaerobically in the sludge. The biogas produced can be used source of energy as it is inflammable. The effluent from the secondary treatment plant is generally released into natural water bodies like rivers and streams.
Steps in primary treatment does not include:

Identify the statements which are true with respect to Euchromatin:
A. Loosely packed
B. Densely packed
C. Stains light
D. Transcriptionally active
Choose the correct answer from the options given below:

Match List - I with List - II.

List - I	List - II
(A) Barrier methods	(I) Prevents physical contact between ovum and sperm
(B) IUD	(II) Sterilizes physical contact between ovum and sperm
(C) Oral Contraceptives	(III) Increases phagocytosis of sperms and suppress sperm motility:

Choose the correct answer from the options given below :

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

Observe the given figure and answer the question.


Which one of the following is not shown in the above figures?

Which of the following statements is correct for a charged metallic shell?

A galvanometer of resistance 520 \( \Omega \) is shunted with 20 \( \Omega \) resistance to convert it into an ammeter. The resistance of the ammeter will be

Nucleotide is obtained by linking nucleoside to phosphoric acid at which position of sugar ?

Read the following paragraph and answer the given questions.
Cancer detection is based on biopsy and histopathological studies. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Do you know why mother's milk is considered very essential for the new-born infant? The yellowish fluid colostrum secreted by mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal. The exaggerated response of the immune system to certain antigens present in the environment is called allergy. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. 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.
Malignant malaria is caused by -

Displacement current (\( i_{d} \)) = \( \epsilon_{0} \frac{d\phi_{E}}{dt} \)
Where symbols have their usual meanings.
Which of the following options gives correct equation for displacement current ?

The halide which will undergo \(SN ^2\) reaction easily: