Identify the correct sequence involved in the formation of female gametophyte in angiosperms?
(A) 2-nucleated embryo sac
(B) Functional megaspore
(C) Female gametophyte
(D) 4-nucleated embryo sac
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Match List-l with List-II:

List-I (Concepts)	List-II (Explanation)
(A) Standing state	(I) Available biomass for the consumption of heterotrophs
(B) Secondary productivity	(II) Rate of formation of organic matter by consumers
(C) Standing crop	(III) Mass of living matter in a trophic level at a given time
(D) Net primary productivity	(IV) Amount of mineral nutrients in the soil at a given time

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Arrange the given structures formed during spermatogenesis in correct sequence.
(A) Spermatozoa
(B) Secondary spermatocytes
(C) Spermatids
(D) Spermatogonia
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Match List-I with List-II

List-I (Types of parasite)	List-II (Examples)
(A) Ectoparasite	(I) Cuckoo
(B) Brood parasite	(II) Human liver fluke
(C) Trematode parasite	(III) Mosquito
(D) Malarial parasite	(IV) Lice on human

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In lac operon, a structural gene is-

The role of ethidium bromide in gel electrophoresis is:

Match List I with List II

List I	List ll
(A) Down's syndrome	(I) 44 + XX/XY
(B) Klinefelter's syndrome	(II) 44 + XO
(C) Turner's syndrome	(III) 44 + XXY
(D) Normal human	(IV) 45 + XX/XY

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If A is an invertible matrix of order 3, then

List-I	List-II
(A) \(|\operatorname{adj} A|\)	(I) \(8|A|\)
(B) \(|A(\operatorname{adj} A)|\)	(II) \(|A|^2\)
(C) \(|2 A|\)	(III) \(\frac{1}{|A|}\)
(D) \(\left|A^{-1}\right|\)	(IV) \(|A|^3\)

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The solution of the differential equation \(\left(x^2+x y\right) d y=\left(x^2+y^2\right) d x\) is

A chain reaction in fission of uranium is possible because

The density of a nucleus of mass number A is proportional to :

Read the passage carefully and answer the Questions
The term vitamin was coined from the word vital +amine since the earlier identified compounds had amino groups. Later work showed that most of them didn't contain amino groups, so the letter "e" was dropped and ther term vitamin is used these days.
Vitamins are classified into two groups depending upon their solubility in water or fat. Fat soluble vitamins are soluble in fat and oils but insoluble in water. They are stored in liver and adipose (fat storing) tissues. Water-soluble vitamins are soluble in water. They must be supplied regularly in the diet as they are readily excreated in urine.
What are the sources of Vitamin B12?

If A is an invertible matrix of order 3 × 3 then the value of |adj(A)| is: