Which of the following is an example of homologous organs?

Read the passage carefully to answer the questions given below
Some strains of `Bacillus thuringiensis` produce proteins that kill certain insects such as lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). In `Bacillus thuringiensis` the toxin is coded by a gene `crylAc` named cry. There are a number of them, for example, the proteins encoded by the genes `crylAc` and `cryllAb` control the cotton bollworms, that of `crylAb` controls corn borer. Using conventional methods of diagnosis (serum and urine analysis, etc.) early detection is not possible. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis. The first clinical gene therapy was given in 1990 to a 4-year old girl with adenosine deaminase (ADA) deficiency. This enzyme is crucial for the immune system to function. The disorder is caused due to the deletion of the gene for adenosine deaminase. `RNAi` takes place in all eukaryotic organisms as a method of cellular defense. This method involves silencing of a specific `mRNA` due to a complementary `dsRNA` molecule that binds to and prevents translation of the `mRNA`.
Which of the following Bt toxin gene controls the corn borer?

Scientific term for a situation where a single gene can exhibit multiple
phenotypic expressio is:

Arrange the following steps in correct sequence for the technique of DNA fingerprinting.
(A) Detection of hybridized DNA fragments by autoradiography
(B) Separation of DNA fragments by electrophoresis
(C) Isolation and digestion of DNA
(D) Transferring of separated DNA fragments and hybridization using labelled VNTR probe
Choose the correct answer from the options given below:

Some strains of Bacillus thuringiensis produce toxic proteins that do not kill:

Arrange the given stages of spermatogenesis in the correct sequence.
(A). Spermatozoa
(B). Spermatocytes
(C). Spermatogonia
(D). Spermatids
Choose the correct answer from the options given below:

'Statins', are produced by which of the following microbe?

The compound which will not respond to Fehling's test is

The given graph shows the variation of terminal potential difference V, across the combination of three identical cells in series to an external resistor versus the current i in the circuit. The internal resistance of each cell is :

The correct statements about \(Cr ^{2+}\) and \(Mn ^{3+}\) are : (atomic number of \(Cr =24\) and \(Mn =25\) )
(A) \(Cr ^{2+}\) is a reducing agent
(B) \(Mn ^{3+}\) is an oxidising agent
(C) Both \(Cr ^{2+}\) and \(Mn ^{3+}\) exhibit \(d^4\) electronic configuration
(D) When \(Cr ^{2+}\) is used as reducing agent chromium ion attains \(d^5\) electronic configuration Choose the \(\backslash\) textbf\{correct\} answer from the options given below :

The value of differentiation of \(x^7+1\) with respect to \(x^6\) is

Answer the question on the basis of passage given below :
One of the notable features of the transition element is the great variety of oxidation states it may show in its compounds. The elements which give the greatest number of oxidation states occur in or near the middle of the series. Manganese, for example exhibits all the oxidation states from +2 to +7. The lesser number of oxidation states at the extreme ends is either due to losing or sharing of few electrons (Sc, Ti) or too many d electrons of higher valence. Early in the first series scandium (II) is virtually unknown and titanium (IV) which is more stable than Ti (III) or Ti (II). On the other end, the only oxidation state of zinc is \(+ 2\).
Cris reducing but Mn is oxidising in nature although both have \(d ^{ 1 }\) configuration. It is due to the reason that Cr configuration changes from

Least basic compound among the following would be: