Plant growth and development practice · Mixed difficulty

Growing season is the season of plants in which there is

Which is NOT true regarding hormones?

Choose the mismatched pair.

Identify two physiological processes induced by two different phytohormones having a common precursor, which is formed due to the catalytic activity of pyruvic dehydrogenase complex. I. more female folwers in cucumber. II. a-amylase production in barley grain. III. Acceleration of fruit ripening in tomato.
IV. Delay in sprouting of potato tubers. the correct combination is

Initial size of leaf A & leaf B was $10\,{\text{c}}{{\text{m}}^2}\,\,\& \,\,100\,{\text{c}}{{\text{m}}^2}$ respectively. Both Leaves A & B have increased their area by $10\,{\text{c}}{{\text{m}}^2}$ in a given time to produce A’ and B’ leaves. Select the incorrect statement.

Growth of plant is

At which stage the enzymatic actions start in
plant?

Temperature required for vernalisation is

____, lies the portion of axis which is undergoing phase of maturation.

Which one increases in the absence of light?

Cytokinins

Select the incorrect statement?

Consider the following statements and select the correct option stating which one is true (T) and which one is false (F)
i) Vernalisation can help in shortening the juvenile or vegetative period of plant and bring early flowering.
ii) Phytochrome is a pigment protein complex which exists in two inter convertible forms $-P_r$, and $P_f$
iii) Sugar beet flowers after getting the inductive cycle of long dark periods and short photoperiods.
iv) 2, 4-D acts as weedicide to remove broad leaved weeds.
v) Auxins promote growth of lateral buds whereas cytokinins inhibit it

I. Increased vacuolation
II. Cell enlargement
III. New cell wall deposition
Which of the above are the characteristics of phase of elongation?
Choose the correct option accordingly

Photoperiodism is

Growth of the plant is open because of

(A): In most biological systems, the initial growth is slow (lag phase).

(R): With limited nutrient supply, the growth slows down, leading to a stationary phase.

Which of the following is not characteristic of changes associated with winter dormancy in many species of temperate plants?

Which of the following statement regarding vernalisation is incorrect?

The cells in the root and shoot apex

Which of the following is essential for plant growth?

The following experiment was performed to test the effect of auxin on the plant growth. Five
plant seedlings (all growing actively) were prepared as below; they were unilaterally
illuminated, and growth was measured after 10 days.

Treatments:

Plant A : Tip not removed, nothing applied

Plant B : Tip removed, nothing applied

Plant C : Tip removed, gelatin block with cytokinin was placed on the cut edge

Plant D : Tip removed gelatin block with auxin placed on the cut edge

Which of the following plants would show curvature after the above treatment?

Florigen is produced in the region of

All gibberellins are

Growth rate means:

Genetically dwarf plants can be induced to grow tall by using

Which of the given plants do not show any correlation between exposure to light duration and induction of flowering response?

Which of the following plant growth regulator, would you used if you are asked to promote rapid internode/petiole elongation in deep water rice plants:

Identify the meristems that cause increase in girth are

Assertion (A): Swelling of piece of wood when placed in water is not a growth.

Reason (R): Swelling of piece of wood when placed in water is an imbibition.