Home
Class 12
BIOLOGY
One hormone stimulates the closure of st...

One hormone stimulates the closure of stomata and another on influences the swelling of the axis in dicot plants.They are-

A

gibberellins and ethylene

B

abscisic acid and cytokinins

C

gibberellins and cytokinins

D

auxin and cytokinins

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTION PAPER 5

    SARAS PUBLICATION|Exercise EXERCISE|88 Videos
  • Model Solved Paper 2020 (3)

    SARAS PUBLICATION|Exercise EXERCISE|39 Videos

Similar Questions

Explore conceptually related problems

In one plant, underground stems are modified to store food and in another plant, the stem tendrils develop from axillary buds to help plants climb. They are:

One of the commonly used plant growth hormone in tea plantations is

One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation,while the third increases the tolerance of plants to various stresses. They are respectively.

Assertion (A): Ethylene is a plant hormone, which can transfer from one plant to another plant. Reason (R): Ethylene is a gaseous hormones in plants.

Given below are your statements (A-D) each with one or two balnks. Select the option which ocrrectly fills the blanks in any two statements. (A) Thymus secretes (i) which help in differentiating of ii (B) The adrenal medulla secretes i which stimulates the breakdown of ii to increased the blood glucose concentration during emergensy situations. (C) The Leydig's cells or i present in the intertubular spaces in testis, produce a group of hormones called ii (D) Thyroid gland secretes i and trliodothyronine which contain ii

Which one of the following hormones is naturally not found in plants:

Read the given statements that define functions of a particular hormone. (i) Regulates the development, maturation and functions of epiddymis, vas deferens, seminal vesicle, prostrate gland, urethra, etc. (ii) Stimulates muscular growth of facial and axillary hair, aggressiveness, low pitch of voice, etc. (iii) Stimulates spermatogenesis. (iv) Act on CNS and sexual behaviour (Libido). (v) Produce anabolic (synthetic) effect on protein and carbohydrate metablosim. (vi) The Leydig,s cells/intestitial cells (present in interbular space). Secrete this hormone under the influence of LH. Which of the following hormones is referred here?

Three straight lines mutually perpendicular to each other meet in a point P and one of them intersects the x-axis and another intersects the y-axis, while the third line passes through a fixed point(0,0,c) on the z-axis. Then the locus of P is

True or False. If false give the correct statement: (i) Exopthalmic goiter is due to the over secretion of thyroxine. (ii) A plant hormone concerned with stimulation of cell division and promotion of nutrient mobilization is cytokinin.

(i) What are the conditions which occur due to lack of ADH and insulin? How are the conditions different from one another? (ii) Write the events involved in the sexual reproduction of a flowering plant. Discuss the first event and write the types.

SARAS PUBLICATION-MODEL QUESTION PAPER 6-EXERCISE
  1. In which one of the following reactions of glycolysis, oxidation takes...

    Text Solution

    |

  2. Cyclic photophosphorylation results in the formation of:

    Text Solution

    |

  3. One hormone stimulates the closure of stomata and another on influence...

    Text Solution

    |

  4. Which of the following statements regarding photoperiodism is false?

    Text Solution

    |

  5. The residual persistent nucellus in the seed of black pepper and beet ...

    Text Solution

    |

  6. Consider the following statements with respect to flowering plants I. ...

    Text Solution

    |

  7. Which of the following is false in angiosperms?

    Text Solution

    |

  8. Each secondary spermatocyte after second meiotic division produces:

    Text Solution

    |

  9. What are hormone releasing IUDs?

    Text Solution

    |

  10. Read the statements regarding a stable community and choose the correc...

    Text Solution

    |

  11. The cytokine barrier among these is:

    Text Solution

    |

  12. Ringworms are caused by:I. Wuchereria,II. Microsporum,III. Haemophilus...

    Text Solution

    |

  13. Read the statements.I. IgE antibodies are produced in an allergic reac...

    Text Solution

    |

  14. The microbial biocontrol agent for butterfly caterpillar is:

    Text Solution

    |

  15. The first human-like hominid was called:

    Text Solution

    |

  16. Oparin and Haldane proposed:

    Text Solution

    |

  17. Flame cells of flatwoims help in:I. osmoregulation,II. Digestion,III. ...

    Text Solution

    |

  18. Read thestatements regarding echinoderms and choose the correct option...

    Text Solution

    |

  19. This class of animals are all ectoparasites in some fishes:

    Text Solution

    |

  20. The structure in earthworm which serves as a wedge to force open crack...

    Text Solution

    |