Home
Class 11
BIOLOGY
Find the correct statements 1. Causal ...

Find the correct statements
1. Causal organism of foolish seedling disease is source of gibberellin
2. Ascorbic acid is growth promoter
3. Ratio of auxin to cytokinin controls differentiation
4. Bolting of cabbage can be induced by treatment with IAA

A

1, 2 and 3 are correct

B

1 and 2 are correct

C

2 and 4 are correct

D

1 and 3 are correct

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • PLANT GROWTH AND DEVELOPMENT

    MODERN PUBLICATION|Exercise COMPETITION FILE ( OBJECTIVE TYPE QUESTIONS (B. CBSE- PMT ( MAIN EXAMINATION) QUESTIONS:))|1 Videos

  • PLANT GROWTH AND DEVELOPMENT

    MODERN PUBLICATION|Exercise COMPETITION FILE ( OBJECTIVE TYPE QUESTIONS (C. MATCHING TYPE QUESTIONS:))|1 Videos

  • PLANT GROWTH AND DEVELOPMENT

    MODERN PUBLICATION|Exercise REVISION EXERCISES (Long Answer Questions )|9 Videos

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|9 Videos

  • PLANT KINGDOM

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos

Similar Questions

Explore conceptually related problems

In a given statement followed by three assumptions numbered I, II and III. An assumption is something supposed or taken for granted. You have to consider the statement and the following assumptions and decide which of the assumptions is implicit in the statement. Then decide which of the answers (1), (2), (3),(4) and (s) is the correct answer. Statement : "Most schools in India continue to be teacher-driven, where students have little participation in the learning process. There is no response to society changes that have been induced by globalisation, developments in communications, networking and technology," - A criticism made by Mr X Assumptions : I. true education means greater participation of students and congruence with societal changes. II. Education can't be obtained by assuming teacher as the only source. III. It is desirable that education be imparted by considering those factors in mind which are in tune with the needs of the student. 1) Only I 2) Only II 3) Both I and II 4) Both II and III 5) None of these

Identify the correct statements and find out the correct combination ? 1. Accumlation of K^(+) ions in guard cells does not require energy 2. A high pH favours stomatal opening 3. Movemant of chloride ions into guard cells is in response to electrical differential created by K^(+) ions 4. With entry of several K^(+) ions and chloride ions, water potential of guard cells increases .

Which among the following statements about bio fertilizers are correct? 1. Azotobacter is one of the Nitrogen fixing bacteria used as a bio fertilizer. 2. They have to be applied to the leaves of the plant only. 3. They alter the chemical composi tion of the soil. 4. They can be used along with organic fertilizers. Select the correct answer using the code given below:

Consider the following statements : 1. In any nation, human development outcomes are a function of economic growth, social policy and poverty reduction measures at the macro-level. 2. The expansion of human development in terms of health and education attainrtent, reduction of income poverty and econonic growth is linked in a synergistic manner. 3. Investment in health and education can enhance human functioning which can eventually alleviate income poverty by improving employ ability. 4. Resources generated through incorne poverty reduction and economic growth can be used to enhance human development. Which of the statements given above are logical and correct?

Read the passage given below and answer the question: Biopolymers are polymers that are generated from renewable natural sources, are often biodegradable and nontoxic. They can be produced by biological systems (i.e. microorganisms, plants and animals), or chemically synthesized from biological materials (e.g., sugars, starch, natural fats or oils, etc.). Two strategies are applied in converting these raw materials into biodegradable polymers: extraction of the native polymer from a plant or animal tissue, and a chemical or biotechnological route of monomer polymerization. Biodegradable biopolymers (BDP) are an alternative to petroleum-based polymers (traditional plastics). Some BDP degrade in only a few weeks, while the degradation of others takes several months. In principle the properties relevant for application as well as biodegradability are determined by the molecular structure. According to the American Society for Testing and Materials, biopolymers are degradable polymers in which degradation results from the action of naturally occurring microorganisms such as bacteria, fungi and algae. Polylactic acid (PLA) is an example of biopolymer. It is a thermoplastic polyester. Generally, there are two major routes to produce polylactic acid from the lactic acid (CH_(3)CH(OH) COOH) monomer. The first route involves condensation-water removal by the use of solvent under high vacuum and temperature. This approach produces a low to intermediate molar mass polymer. An alternative method is to remove water under milder conditions, without solvent, to produce a cyclic intermediate dimer, referred to as lactide. This intermediate is readily purified by vacuum distillation. Ring opening polymerization of the dimer is accomplished under heat, again without the need for solvent. By controlling the purity of the dimer it is possible to produce a wide range of molar masses .PLA is a good material for production of clothing, carpet tiles, interior and outdoor furnishing, geotextiles, bags, filtration systems, etc. The primary biodegradability of PLA was tested using hydrolysis tests at various composting temperatures and pH. It was demonstrated that composting is a useful method for PLA biodegradation. The degradation rate is very slow in ambient temperatures. A 2017 study found that at 25^(@)C in sea water, PLA showed no degradation over a year. As a result, it is poorly degraded in landfills and household composts, but is effectively digested in hotter industrial composts. (source: Flieger, M., Kantorová, M., Prell, A., Rezanka, T., & Votruba, J. (2003). Biodegradable plastics from renewable sources. Folia Microbiologica, 48(1), 27 44. doi:10.1007/bf02931273) In the question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage. Assertion: Lactic acid undergoes condensation polymerisation Reason: Lactic acid is a bifunctional monomeric unit.

Which of the following statements are correct? 1.Gibberellins can substitute light treat- ment 2. Gibberellins increase the yield of malt from barley grains in the brewing industry 3. Gibberellins favour flowering in long day plants 4. Gibberellins induce flowering in short day plants Select the correct answer using the codes given below