NEET · Biology · STD 11 - 5. Morphology flowering plants

Among flowers of Calotropis, tulip, Sesbania, Asparagus, Colchicum, sweet pea, Petunia, Indigofera, mustard, soybean, tobacco and groundnut, how many plants have corolla with valvate aestivation?

A Six
B Seven
C Eight
D Five

Verified Solution

Answer & Solution

Correct Answer

(B) Seven

Step-by-step Solution

Detailed explanation

(b) : The mode of arrangement of the sepals or petals with respect to one another in the floral bud is termed as aestivation. Aestivation is of different types- valvate, twisted or contorted, imbricate, quincuncial, vexillary, convolute, and plicate. In valvate aestivation, sepals or petals or tepals just touch each other without any overlapping. Calotropis, tulip, Asparagus, Colchicum, Petunia, mustard and tobacco have valvate aestivation.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Match the following enzymes with their functions

\((a)\) Restriction endonuclease	\((i)\) Joins the \(DNA\) fragements
\((b)\) Restriction exonuclease	\((ii)\) Extends primers on genomic \(DNA\) template
\((c)\) \(DNA\) ligase	\((iii)\) Cuts \(DNA\) at specific position
\((d)\) Taq polymerase	\((iv)\) Removes nucleotides from the ends of \(DNA\)

Select the correct option from the following

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Select the correct option. Column I - Column II

Column \(I\)	Column \(II\)
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(B) Synthesis of \(RNA\) and protein	(ii) Zygotene
(C) Action of enzyme recombinase	(iii) \(G_2\) phase
(D) Centromeres do not separate but chromatids move towards opposite poles	(iv) Anaphase \(I\)
	(v) Pachytene

NEET 2015 Medium

Match List \(I\) with List \(II\)

List \(I\)	List \(II\)
\(A\). Clostridium butylicum	\(1\). Ethanol
\(B\).Saccharomycescerevisiae	\(II\). Streptokinase
\(C\).Trichodermapolysporum	\(III\). Butyric acid
\(D\). Streptococcus sp.	\(IV\).Cyclosporin-\(A\)

Choose the correct answer from the options given below:

NEET 2024 Medium

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