In a fertilized ovule, n, 2n and 3n cond...

In a fertilized ovule, n, 2n and 3n conditions occur respectively in

antipodal, zygote and endosperm

zygote, nucellus and endosperm

endosperm, nucellus and zygote.

antipodals, synergids and integusments

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In a mature and fertilized ovule n, 2n and 3n conditions respectively occur in:

Commonly in a mature fertilised ovule n, 2n and 3 condition is respectively found in :

If S_1 ,S_2 and S_3 denote the sum of first n_1,n_2 and n_3 terms respectively of an A.P. Then S_1/n_1 (n_2-n_3) + S_2/n_2 (n_3-n_1)+S_3/n_3 (n_1-n_2) equals :

(2n-1) condition of chromosomes is called :-

If T_(n) and t_(n) be the nth term of two AP's respectively and the ratio of sum of n terms of these AP's is (2n-3)/(4n+1) AA n epsilonN then identify the correct option

If barx_(1), barx_(2), barx_(3),………barx_(n) are the means of n groups with n_(1), n_(2), …………,n_(n) number of observations, respectively, then the mean barx of all the groups taken together is given by

Which of the following statements is/are correct? (A) The oxidation states of "N" in NH_(3),HN_(3) & N_(2)H_(4) are "-3,-1/3" and "-2",respectively. (B) The oxidation states of "N" in NO_(2),N_(2)O_(4) & NO_(2)^(-) are "+4,+4," and "+3",respectively. (C) The oxidation states of "N" in NH_(2)OH,NO & HNO_(3) are -1,+2 and +5,respectively. (D) The oxidation states of N in N_(2)O & HCN are "+1" and "-3" respectively.

CBSE MODEL PAPER-SAMPLE PAPER 2022-SECTION - B

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