Download App

Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
State what is apomixis. Comment on its significance. How can it be commercially used?
✓

Answer

Apomixis is a type of asexual reproduction that mimics sexual reproduction to form seeds without fertilisation.
In apomictic seeds, parental characters are maintained in the progeny/ offspring as there is no meiosis or segregation of characters.
If desired hybrid seeds are made apomictics the farmers can keep on using the hybrid seeds to raise new crops year after year.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Sexual Reproduction in Flowering Plants→Sexual Reproduction in Flowering Plants — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Human blood group is a good example of multiple allelism and co-dominance. Justify.
→
(i) EcoRI has played a very important role in recombinant DNA technology.
(a) Explain the naming convention of Eco RI.
(b) Write the name of the recognition site and cleavage site of this restriction enzyme.
(ii) What is the longitudinal extension of DNA produced by these restriction enzymes called? Describe their role in the formation of r-DNA.
→
Give the full form of CT and MRI. How are they different from each other? Where are they used?
→
  1. Why are transgenic animals so called?
  2. Explain the role of transgenic animals in (i) Vaccine safety and (ii) Biological products with the help of an example each.
→
What are gemmules? Name the organism which produce gemmules. Make a labeled diagram of gemmule.
→
Biodiversity plays a key role in many ecosystem services provided by nature.
(a) Present any two widely useful arguments to prove the validity of the statement.
(b) Write any one moral reason for protecting biodiversity.
→
i. How does mutation occur?
ii. Differentiate between point mutation and frameshift mutation.
→
Where is an operator' located in a prokaryotic DNA? How does an operator regulate gene expression at transcription level in a prokaryote? Explain.
→
Rearrange Ramapithecus, Australopithecus and Homo habilis in the order of their evolution on the Earth. Comment on their evolutionary characteristics.
→
Write a note on cultural and religious importance of biodiversity Which type of conservation measures, in situ or ex-situ will help the larger number species to survive? Explain.
→