The bioassay of auxin is
The bioassay of auxin is
Options
(a) Avena curvature test (b) callus formation (c) culture of fungus (d) seed dormancy
Correct Answer:
Avena curvature test
Explanation:
Bioassay is a testing of biological activity […]
Plant Growth and Development
Tendrils exhibit
Tendrils exhibit
Options
(a) thigmotropism (b) sismonasty (c) heliotropism (d) diageotropism
Correct Answer:
thigmotropism
Explanation:
Thigmotropism is a directional curvature movement of growth which is produced in response to the stimulus of contact. […]
Sleeping movements in some plants is called
Sleeping movements in some plants is called
Options
(a) seismonasty (b) nictynasty (c) photonasty (d) thermonasty
Correct Answer:
nictynasty
Explanation:
Sleep movement or nyctinasty (sleep movement during night) occurs in the leaves of […]
Sleep movements of leaves in some plants are due to
Sleep movements of leaves in some plants are due to
Options
(a) excess of respiration (b) leaves stop photosynthesis (c) excess of transpiration (d) osmotic changes at the base of leaves
Correct Answer: […]
Rhizocalin is a additional hormonal substance which is secreted by
Rhizocalin is a additional hormonal substance which is secreted by
Options
(a) Cotyledons (b) Roots (c) Leaves (d) Stem
Correct Answer:
Leaves
Explanation:
Rhizocaline is also called as root forming hormone and it […]
Response to contact is known as
Response to contact is known as
Options
(a) galvanotaxis (b) thigmotaxis (c) thermotaxis (d) rheotaxis
Correct Answer:
thigmotaxis
Explanation:
Thigmotropism is a directional curvature movement of growth which is produced in response to […]
Removal of seed coat in dormant seeds by mechanical methods is called
Removal of seed coat, in dormant seeds, by mechanical methods is called
Options
(a) separation (b) emasculation (c) venalization (d) scarification
Correct Answer:
scarification
Explanation:
Scarification is rupturing of seed coats by abrasion […]
Pigment associated with physiological function
Pigment associated with physiological function
Options
(a) phytochrome (b) anthocyanin (c) chlorophyll (d) carotene
Correct Answer:
phytochrome
Explanation:
Phytochrome is a pigment involved in the perception of photoperiodic stimuli controlling flowering, lettuce seed […]
Phytochrome in plants is sensitive to
Phytochrome in plants is sensitive to
Options
(a) green light (b) blue light (c) red light (d) red and far red light
Correct Answer:
red and far red light
Explanation:
Phytochrome is a […]
Photoperiodic stimulus is received by
Photoperiodic stimulus is received by
Options
(a) Leaves (b) Buds (c) Meristem (d) Flowers
Correct Answer:
Leaves
Explanation:
Photoperiodic stimulus is perceived by mature/old leaves