Air bubbles are sparged into bioreactor tanks. The role of these bubbles is to:

Punnett Square was developed by:

Match List-l with List-ll

List-l (Population interactions)	List-ll (Species A / Species B)
(A) Amensalism	(I) - / -
(B) Commensalism	(II) + / -
(C) Predation	(III) + / 0
(D) Competition	(IV) - / 0

'-' sign for detrimental interaction. '+' sign for beneficial interaction. '0' sign for neutral interaction.
Choose the correct answer from the options given below:

Arrange the given species in correct trophic levels in a grassland ecosystem?
(A) Crow
(B) Vulture
(C) Rabbit
(D) Grass
Choose the correct answer from the options given below:

Which codon has dual functions?

Which one of the following contributes the maximum percentage to the biodiversity of a vertebrate group?

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.
The drug, which is very effective sedative and painkiller and useful for patients who have undergone surgery is -

Match List - I with List - II.

List - I	List - II
(A) Aspergillus niger	(I) Butyric acid
(B) Clostridium butylicum	(II) Acetic acid
(C) Saccharomyces cerevisiae	(III) Citric acid
(D) Acetobacter aceti	(IV) Ethanol

Choose the correct answer from the options given below:

Edema is caused by

The probability that in a year of the 22nd century chosen at random, there will be 53 Sundays is:

Which of the following statements are correct?
(A) Permeability of soft iron < permeability of steel
(B) Susceptibility of soft iron > susceptibility of steel
(C) Retentivity of soft iron > Retentivity of steel
(D) Coercivity of soft iron > coercivity of steel
Choose the correct answer from the options given below :

How many \(Cr-O\) bonds in dichromate ions are of the same bond length and are in resonance?

A box contains 10 balls, each marked with one of the digits 0 to 9 .
If four balls are drawn successively with replacement from the box,
then the probability that none is marked with the digit \(0\) is :