The ability of some snails and fish to avoid summer related problems like heat and dessication is called

In which stage of sewage treatment, large amount of air is pumped into it?

Which one of the following is known as cytokine barriers?

Sickle cell anaemia is :

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

Read the following passage carefully and answer the given questions
The separated DNA fragments can be visualized only after staining the DNA with ethidium bromide followed by exposure to UV radiation. Bright orange colored bands of DNA in ethidium bromide stained gel exposed to UV light can be seen. The separated bands of DNA are cut out from the agarose gel and extracted from the gel piece. This step is known as elution. The DNA fragments purified in this way are used in constructing recombinant DNA by joining them with a cloning vector.
The extraction of separated bands of DNA from the gel piece is called:

Cocaine is obtained from

Arrange the following in the increasing order of their energy band gap
(A) Si
(B) Ge
(C) C
(D) Sn
Choose the correct answer from the options given below:

Which one of the following plants is the source of cannabinoids commonly used in drug abuse?

The electronic conductance depends on:
(A) The nature and structure of the metal
(B) Composition of metallic conductor
(C) The number of valence electrons per atom
(D) Temperature
(E) Number of ions
Choose the correct answer from the options given below:

Which of the following statements are not correct?
A. Phenol is used to prepare analgesic drugs.
B. Solubility of phenol in water is more than that of chlorobenzene.
C. Phenol is neutralised by sodium carbonate.
D. Boiling point of o- nitrophenol is lower than that of p-nitrophenol.
Choose the most appropriate answer from the options given below:

Let us consider interference between two sources of intensities \( I \) and \( 4I \). What will be the intensity at points where the phase difference is \( \pi \) ?

Identify the correct statement for Zygote Intra-Fallopian Transfer (ZIFT).