Tag: theories of shoot apical meristem development

Questions Related to theories of shoot apical meristem development

Match column I with column II and select the correct option from the given codes.

   Column  I     Column II
 A.  Vegetative buds  i.  Buds develop in axils of leaves
 B.  Floral buds  ii.  Buds produce leafy shoots 
 C.  Axillary buds  iii.  Reproductive buds that produce flowers
 D.  Accessory  iv  Additional buds borne at leaf bases
biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. (A) - (ii), (B) - (iii), (C) - (i), (D) - (iv)

  2. (A) - (iii), (B) - (ii), (C) - (i), (D) - (iv)

  3. (A) - (iv), (B) - (iii), (C) - (ii), (D) - (i)

  4. (A) - (i), (B) - (ii), (C) - (iv), (D) - (iii)

Show answer
Correct Option: A
Explanation:

Bud is a condensed rudimentary shoot. Such buds developed into leafy shoots.

  • Axillary buds: originate from the axils of leaves.
  • Vegetative buds: Buds that give rise to new shoots and leaves. Presence of such bud indicates the regrowth of the plant.
  • Floral bud: It is swelling or formation of a premature flower bloom. This bud will eventually produce a flower.
  • Accessory bud:  A bud growing near and in addition to a axillary bud.
  • So, the correct answer is " (A)- (ii),(B)- (iii), (C) - (i), (D) - ( iv).

Flower is always solitary when:

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Shoot bud transforms into flower

  2. Shoot tip transforms into flower

  3. Lateral shoot transforms into flower

  4. Horizontal shoot transform into flower

Show answer
Correct Option: B
Explanation:

Option (B) Shoot tip transform into flower.

Shoot tip meristem gets to stop to divide as the shoot cells, and flower formation takes place.
Solitary means a single flower.
When the tip of the shoots is gets transformed into a flower only one single flower will be formed.
Because single tip of shoot have ability to carry only single flower.

Aecessory buds are-

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Axillary buds

  2. Adventitious buds

  3. Terminal buds

  4. Not true buds

Show answer
Correct Option: A

The cells of root apex and shoot apex?

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Are poor in cytoplasmic content

  2. Possess small and inconspicuous nuclei

  3. Are with abundant plasmodesmatal connections

  4. Possess cell wall which is always secondary in nature

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Correct Option: A

Bud associated with the underground stem of potatoes is?

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Axillary

  2. Apical

  3. Adventitious

  4. Internodal

Show answer
Correct Option: A

If there is more than one tunica layer in a stern apex. 

Which among the following is most likely to happen?

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. All the layers will develop into epidermal cells

  2. Only the outer layer will develop into epidermal cells

  3. All the layers will develop into cortex

  4. Inner layer develops into cortex

Show answer
Correct Option: B
Explanation:

Even, if there is more than one tunica layer in the stem apex, only the outer layer will develop into the epidermal cells. The stem has three simple cell types, i.e. the parenchyma, collenchyma and sclerenchyma cells which are responsible for the metabolic functions, repairing and healing wounds and storing starch.

The correct option is B.

The organization of the shoot apex into tunica and corpus is determined largely on the basis of _______________.

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Rate of shoot tip growth

  2. Rate of cell division

  3. Planes of cell division

  4. Regions of meristematic activity

Show answer
Correct Option: B
Explanation:

Schmidt has postulated tunica- corpus theory on the basis of studies of shoot apices of angiosperm. This theory is concerned with planes of cell division in the apex. In contrast to apical cell theory, the tunica-corpus theory is applicable only to shoot apex and not to root. There are three types of meristematic tissues like apical (at the tips), intercalary (in the middle) and third as lateral (at the sides).

Schmidt distinguished two tissue zones in the shoot apex and termed as tunica and corpus.

The correct answer is B.

Heaping of earth around base of stem in Potato is meant for.

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Preventing exposure of roots

  2. Providing extra support to delicate stem

  3. Inducing development of more auxiliary shoots

  4. Making more water available

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Correct Option: C

Assertion (A): Lateral buds close to the shoot apex remain dormant while those some distance below below the apical meristem develop into shoots.

Reason (R): Apical shoot meristems and young leaves are the centres of lAA synthests.

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Both A and Rare individually true and R is the correct explanation of A

  2. Both A and Rare individually true and R is not the correct explanation of A

  3. A is true but R is false

  4. A is false but R is true Assertion

Show answer
Correct Option: A

The shoot branching depends upon the development of axillary buds, but many of the buds in axillary position never grow out due to the _____________________.

biology anatomy of flowering plants theories of meristematic cell development theories of shoot apical meristem development shoot and root apex

  1. Inhibitory factor present in the axillary bud

  2. Inhibitory factor present in the apical bud

  3. Interaction of factors present in both the axillary & apical bud

  4. Ibhibition under genetic control

Show answer
Correct Option: A