Biology questions
20584 published questions with worked solutions.
- Which plant hormone is found in gaseous form?
- Surface area of roots by promoting root growth and root hair formation is increased by
- It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially...
- A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth...
- In response to biotic and abiotic stress, growth inhibition activities are caused by
- Which one of the following growth regulators is known as ‘stress hormone’?
- Abscisic acid
- Identify A and B. Compound — Function I: 2, 4-D — A II: B — Fruit ripening Choose the correct option. [MHTCET 2023]
- Read the following statements about the functions of auxin and choose the correct option. [MHTCET 2023]
- Select the correct statements regarding auxins. 1. Auxins promote flowering, e.g. in pineapple and promote abscission of older...
- Which of the following statements regarding gibberellins is incorrect? [MHTCET 2022]
- Read the following statements. 1. Cytokinins play a vital role in morphogenesis in plants. 2. In tissue culture, both auxin and...
- Identify the phytohormone responsible for the given functions. 1. Horizontal growth of seedlings. 2. Swelling of the axis and...
- The hormone ‘X’ does the following functions. 1. Acts as general plant growth inhibitor and an inhibitor of plant metabolism. 2....
- Read the following statements about effects of ethylene and choose the correct statement. 1. More female flowers in cucumber. 2....
- Given below the functions of different plant growth hormones. Which of the following statements is incorrect? [MHTCET 2020]
- Root cap has no function in water absorption, because [MHTCET 2019]
- In root hairs, the cell wall is _____, but plasma membrane is ______. [MHTCET 2018]
- Select an appropriate hormone responsible for apical dominance from the following. [MHT CET 2017]
- Quickness of the response in animals is due to