मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Find out what the various components of the medium used for propagation of an explants in vitro are? - Biology

Advertisements
Advertisements

प्रश्न

Find out what the various components of the medium used for propagation of an explants in vitro are?

थोडक्यात उत्तर

उत्तर

The culture media used to propagate an explant in vitro contains nutrients such as inorganic salts, vitamins, 2-4% sucrose, the amino acid glycine, and growth regulators such as auxin and cytokinin, with or without yeast extract, coconut milk, or banana pulp. The culture media might be liquid, semisolid with gelatin, or solidified with agar. The explant needs these nutrients for proper growth and development.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 9: Strategies for Enhancement in Food Production - Exercises [पृष्ठ १७८]

APPEARS IN

एनसीईआरटी Biology [English] Class 12
पाठ 9 Strategies for Enhancement in Food Production
Exercises | Q 11 | पृष्ठ १७८

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

What is mycoherbicide?


What happens when Meloidegyne incognitia consumes cells with RNAi gene?


What are Cry proteins?


what is golden rice.


How has the use of Agrobacterium as vectors helped in controlling Meloidegyne incognitia infestation in tobacco plants? Explain in correct sequence.


Answer the following question.
How is a continuous culture system maintained in bioreactors and why?


Answer the following question.
List any four ways by which GMOs have been useful for enhanced crop output.


Answer the following question.
Write the desirable characters a farmer looks for in his sugarcane crop.


At what temperature milk gets pasteurised?


The trigger for activation of toxin of bacillus thuringlensis is ______.


Golden rice is ______.


Many proteins are secreted in their inactive form. This is also true of many toxic proteins produced by microorganisms. Explain how the mechanism is useful for the organism producing the toxin?


What is meant by the term bio-pesticide? Name and explain the mode of action of a popular bio-pesticide.


Insects in the Lepidopteran group lay eggs on maize crops. The larvae on hatching feed on maize leaf and tender cob. In order to arrest the spread of three such Lepidopteran pests, Bt maize crops were introduced in an experimental field.
A study was carried out to see which of the three species of lepidopteran pests was most susceptible to Bt genes and its product.
The lepidopteran pests were allowed to feed on the same Bt-maize crops grown on 5 fields (A-E).
The graph below shows the leaf area damaged by these three pests after feeding on maize leaves for five days.

Key for lepidopteran insect pest species

Species I
Species II
Species III

Insect gut pH was recorded as 10, 8 and 6 respectively for Species I, II and III respectively.

(a) Evaluate the efficacy of the Bt crop on the feeding habits of the three species of stem borer and suggest which species is least susceptible to Bt toxin.

(b) Which species is most susceptible to Bt-maize, and explain why?

(c) Using the given information, suggest why a similar effect was not seen in the three insect species.


State any two benefits of Genetically modified crops.


The main objective of the production of pest-resistant GM crops is to ______.


Compare and contrast the disadvantages of production of genetically modified crops.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×