Through their effects on plant growth regulators,
what do the temperature and light control in the
plants?
(a) Apical dominance
(b) Flowering
(c) Closure of stomata
(d) Fruit elongation

1 Answer

Answer :

(b) Flowering

Related questions

Description : Which of the following control the root initiation, cell elongation and apical dominance? (A)Auxins (B) ABA (C) Gibberellins (D) Ethylene

Last Answer : (D) Ethylene

Description : Which of the following control the root initiation, cell elongation and apical dominance? (A)Auxins (B) ABA (C) Gibberellins (D) Ethylene

Last Answer : (B) ABA

Description : Phytohormones are (a) chemical regulating flowering (b) chemical regulating secondary growth (c) hormones regulating growth from seed to adulthood (d) regulators synthesised by plants and influencing physiological processes.

Last Answer : (d) regulators synthesised by plants and influencing physiological processes.

Description : If the apical bud has been removed then we observe (a) more lateral branches (b) more axillary buds (c) plant growth stops (d) flowering stops.

Last Answer : (a) more lateral branches

Description : Removal of apical bud results in (a) formation of new apical bud (b) elongation of main stem (c) death of plant (d) formation of lateral branching.

Last Answer : d) formation of lateral branching.

Description : Hormones which control apical dominance are: a. Auxins b. Cytokinins c. Gibberellins d. Polyamines

Last Answer : Cytokinins

Description : Advantage of apical dominance to a plant? -Biology

Last Answer : answer:

Description : Advantage of apical dominance to a plant? -Biology

Last Answer : answer:

Description : Which of the following plant hormones are incorrectly paired? (1) abscisic acid- transpiration (2) auxins- apical dominance (3) cytoldnins- senescence (4) gibberlins- bud and seed dormancy

Last Answer : (4) gibberlins- bud and seed dormancy Explanation: Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.

Description : Which of the following plant hormones are incorrectly paired? (1) abscisic acid- transpiration (2) auxins-apical dominance (3) cytokinins- senescence (4) gibberlins- bud and seed dormancy

Last Answer : gibberlins- bud and seed dormancy

Description : Abscisic acid causes (a) stomatal closure (b) stem elongation (c) leaf expansion (d) root elongation.

Last Answer : (a) stomatal closure

Description : Which one of the following pairs, is not correctly matched? (a) Gibberellic acid - Leaf fall (b) Cytokinin - Cell division (c) IAA - Cell wall elongation (d) Abscissic acid - Stomatal closure

Last Answer : (a) Gibberellic acid - Leaf fall

Description : Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following. (a) Tyloses in vessels (b) Closure of stomata (c) Flaccidity of bulliform cells (d) Shrinkage of air spaces in spongy mesophyll

Last Answer : (c) Flaccidity of bulliform cells

Description : What is apical dominance? -Biology

Last Answer : answer:

Description : Apical dominance can be removed by? -Biology

Last Answer : answer:

Description : Role of auxins in apical dominance? -Biology

Last Answer : answer:

Description : Why is apical dominance adaptive? -Biology

Last Answer : answer:

Description : What controls apical dominance? -Biology

Last Answer : answer:

Description : Apical dominance lateral buds. -Biology

Last Answer : answer:

Description : Apical dominance of potato. -Biology

Last Answer : answer:

Description : What is apical dominance? -Biology

Last Answer : answer:

Description : Apical dominance can be removed by? -Biology

Last Answer : answer:

Description : Role of auxins in apical dominance? -Biology

Last Answer : answer:

Description : Why is apical dominance adaptive? -Biology

Last Answer : answer:

Description : What controls apical dominance? -Biology

Last Answer : answer:

Description : Apical dominance lateral buds. -Biology

Last Answer : answer:

Description : Apical dominance of potato. -Biology

Last Answer : answer:

Description : $ Those lateral buds which are near the apical bud are called dormant buds. ! Dormancy of lateral buds is due to Apical dominance

Last Answer : $ Those lateral buds which are near the apical bud are called dormant buds. ! Dormancy of lateral buds is ... is wrong D. If both As and R are wrong.

Description : The PGR causes apical bud dominance

Last Answer : Ans. Auxins

Description : ________ can release lateral buds from apical dominance : a. Auxins b. Gibberellins c. Kinins d. None of above

Last Answer : Kinins

Description : Mowing grass lawn facilitates better maintenance because (a) wounding stimulates regeneration (b) removal of apical dominance and stimulation of intercalary meristem (c) removal of apical dominance (d) removal of apical dominance and promotion of lateral meristem.

Last Answer : (b) removal of apical dominance and stimulation of intercalary meristem

Description : The hormone responsible for apical dominance is (a) IAA (b) GA (c) ABA (d) Florigen.

Last Answer : (a) IAA

Description : Apical dominance is caused by (a) abscisic acid in lateral bud (b) cytokinin in leaf tip (c) gibberellin in lateral buds (d) auxin in shoot tip.

Last Answer : (d) auxin in shoot tip.

Description : How does pruning help in making the hedge dense? (a) It releases wound hormones. (b) It induces the differentiation of new shoots from the rootstock. (c) It frees axillary buds from apical dominance. (d) The apical shoot grows faster after pruning

Last Answer : (c) It frees axillary buds from apical dominance.

Description : Mention the functions of plant growth regulators.

Last Answer : Plant growth regulators promote cell division, cell enlargement/elongation and cell differentiation. They induce photropic movement of shoot system.

Description : What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows? (a) Light stimulates plant cells on the lighted side to grow ... Green plants need light to perform photosynthesis. (d) Green plants seek light because they are phototropic.

Last Answer : (b) Auxin accumulates on the shaded side, stimulating greater cell elongation there

Description : Consider the following pairs Plant hormone Function/Effect 1. Indole-3 acetic acid - Rooting in cuttings 2. Gibberellic acid - Stomatal closure 3. Ethylene - Fruit ripening 4. Zeatin - Cell division Which of the above pairs are correctly matched ... 3 (b) 1, 2, and 4 (c) 2 and 4 (d) 1, 2, 3, and 4

Last Answer : Ans:(b)

Description : In higher plants the growing apical bud inhibits the growth of the lateral (axillary) buds, this phenomenon is called

Last Answer : In higher plants the growing apical bud inhibits the growth of the lateral (axillary) buds, this phenomenon is called

Description : In higher plants the growing apical bud inhibits the growth of the lateral (axillary) buds, this phenomenon is called

Last Answer : In higher plants the growing apical bud inhibits the growth of the lateral (axillary) buds, this phenomenon is called

Description : 134 Given below are the statements about the harmful effects of weeds on crop plants. i. They interfere in harvesting ii. They help crops to grow healthy. iii. They compete with crop plants for water, nutrients , space and light ... statements a) i, iii, iv b)iii only c) iii , iv d) i, ii , iii, iv

Last Answer : a) i, iii, iv

Description : I have beautiful large, flowering zuc and pumpkin plants but they wont start fruit? anyway to make that happen?

Last Answer : You probably have male flowers and few if any female flowers. Female flowers have what appears to be the beginnings of the fruit back behind the flower. Male flowers have pointy protrusion in the ... take the sticky pollen from the male flower and deposit it in the center of the female flower.

Description : Consider the following statements about pollination. 1. Transfer of pollen grains from the anther to ovules in the same flower or a different f lower is called pollination. 2. The pollination by wind is called anemophily. 3. Pollination is a ... 1 and 3 (b) 1, 2 and 4 (c) Only 2 (d) 1, 2, 3 and 4

Last Answer : Ans:(c)

Description : How seed and fruit are formed in flowering plants? What are the parts of seed? 

Last Answer : Seed Formation: - Ripened ovule after fertilization is called seed. The seeds are the embryos of flowering plants in dormant stage. Seeds provide protection and nourishment to the embryo. A seed has three ... fleshy or scaly and forms fruit. Fruit protect seed and help in dispersal of the plant.  

Description : Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Last Answer : (a) Ovules develop into embryo sac.

Description : Mention the types of growth regulators and give example.

Last Answer : a) Plant growth promoters ex: Auxins, Gibberellins, cytokinins b) Plant growth inhibitors ex: Abscisic acid, Ethylene

Description : Give reason: Phytohormones are also called growth regulators.

Last Answer : Phytohormones are organic compounds which regulate plant growth and development in plants. Hence they are called growth regulators also.

Description : Synthetic growth regulators are com- monly known as

Last Answer : Morphactins

Description : The amount of growth regulators present in naturally parthenocarpic fruits is: a. High b. Low c. Intermediate d. None of above

Last Answer : High

Description : Which one of the following growth regulators is known as ‘stress hormone’? (a) Abscisic acid (b) Ethylene (c) GA3 (d) Indole acetic acid

Last Answer : (a) Abscisic acid

Description : Plants absorb most of the water needed by them through their (a) Embryonic zone (b) Growing point (c) Root hairs (d) Zone of elongation

Last Answer : Ans:(c)