Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for breeding programmes? 
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
answered-by-expert Expert Answer

The pollen grains can be cryopreserved (storing in liquid nitrogen at −196°C.)

Answered by | 12 Jun, 2014, 01:10: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Biology
Differences between stain and varieities
Asked by dkjainf77 | 09 May, 2019, 10:25: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Suggest a method to overcome excessive inbreeding depression.
Asked by ramandeep.kaur | 15 Mar, 2019, 02:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
an area is sprayed with DDT by an aircraft what happens to the nearby lake  a. mortality of fishes  b. no effect
Asked by kaintkaku | 24 Apr, 2018, 10:15: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
How can pollen grains of wheat and rice which tend to lose viability within 30 minutes of their release be made available months later for breeding programmes? 
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
State the importance of biofortification. 
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
State any one significance of interspecific hybridisation in plants.
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
Why does the pure line represent the progeny of homozygous plants?
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
(i) Name the chemical used for doubling the chromosome number. (ii) Name the improved variety of wheat which was developed through hybridisation that took 12 years.
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
What is inbreeding in plants? What happens to the recessive alleles in this process? 
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Biology
What is interspecific hybridisation? Give one example of a crop in which it is practised and mention one advantage derived from it. 
Asked by Topperlearning User | 12 Jun, 2014, 11:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×