MHT CET · BIOLOGY · STD 12 - 7. Plant Growth and Mineral Nutrition

To induce early flowing in plants, pre-treatment of seeds or seedlings is done at ______________ \(^{\circ} \mathrm{C}\) temperature.

A 1-6
B 10-13
C 14-20
D 20-30

Verified Solution

Answer & Solution

Correct Answer

(A) 1-6

Step-by-step Solution

Detailed explanation

Vernalization is the method of inducing early flowering in the plants by pretreatment to their seeds/ seedlings at low temperature (1-\(6^{\circ} \mathrm{C}\) for one to one and half months duration).

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.

Same subject

Match the column-I with column-II and select the correct option.

	Column I (Traits)		Column II (Type of inheritance)
i.	Roan cattle	a.	Multiple allelism
ii.	Pink flowered Mirabilis jalapa plant	b.	Co-dominance
iii.	Sickle cell anaemia	c.	Incomplete dominance
iv.	Wings in Drosophila	d.	Pleiotropism

MHT CET 2023 Hard

Match the embryonal cell in column I with -their origin given in column II and choose the correct options given below.

	Column I		Column II
a.	Suspensor initial	i.	Large basal cell of the 2-celled pro-embryo
b.	Embryonal initial	ii.	First cell of the suspensor towards micropylar end.
c.	Haustorium	iii.	Lower most cell of the suspensor
d.	Hypophysis	iv.	Small terminal cell 2-celled of pro-embryo

MHT CET 2021 Easy

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