Question
List three strategies that a bisexual flower can evolve to prevent self – pollination.
✓
Answer
Dichogamy: The condition in which the maturation of stigma and anther takes place at different times so as to prevent self – fertilisation.
Heterostyly: In this, anther and stigma are placed at different positions, so the pollens can not come in contact with stigma of the same flower.
Herkogamy: It is the non-transferred of pollen from anther to stigma of the same flower due to a mechanical barrier between anther and stigma.
Heterostyly: In this, anther and stigma are placed at different positions, so the pollens can not come in contact with stigma of the same flower.
Herkogamy: It is the non-transferred of pollen from anther to stigma of the same flower due to a mechanical barrier between anther and stigma.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Alien species are highly invasive and are a threat to indigenous species. Substantiate this statement with any three examples.
Describe the experiment that helped Louis Pasteur to dismiss the theory of spontaneous generation of life.
What is genetic engineering? Explain the technique of Recombinant DNA production.
What are the three types of RNA? Mention their relation to protein synthesis.
In an E. coli cloning vector pBR 322, state the role of the following genes:
- Ori gene.
- Antibiotic resistance gene.
- Rop gene.
Draw a labeled diagram of pistil and describe in brief about each part.
During a fire in an auditorium, a large number of assembled guests got burnt beyond recognition. Suggest and describe a modern technique that can help hand over the dead to their relatives.
Briefly give an account of various intra uterine devices. How do they function? What is their advantage?
Explain co-evolution with reference to parasites and their hosts. Mention any four special adaptive features evolved in parasites for their parasitic mode of life.
OR
Explain parasitism and co-evolution with the help of one example of each.Study the diagram given below:
