Biology
- Mutualism
All flowers have mutualistic relationship with bees. In order to make their honey, bees travel from flower to flower collecting nectar. On the other hand, when the bee goes from flower to flower it brings pollen with her, resulting in pollination. The...
- Pollen: Evolution
In this picture is pollen that got stuck to the ground because of juice or water. Pollen has been flying around because plants and flowers are blooming and they are ready to fertilize. Pollen is like a tiny grain inside id a seed plant which usually...
- Stigma (pl Stigmata)
Term: stigmaOrigin: Anc Greek ??????/stigma(=mark, fleck, puncture) >?????/tego(=blotch, spot) originally stigma was a mark or brand on Greek slaves made on skin by burning with a hot iron, distinguishing them from free men.Definition:...
- 2. Sexual Reproduction In Flowering Plants
Click here for PDFAll flowering plants (angiosperms) show sexual reproduction. PRE-FERTILISATION: STRUCTURES & EVENTS- Several hormonal and structural changes are initiated which lead to the differentiation and further development...
- The Perils Of Plant Monogamy
Biology concepts ? pollination, single pollinator, co-evolution, co-divergence What?s bugging her, it?s supposed to be a party!Imagine the best party of the year ? it?s cold outside, but hot inside. The food is great, all your friends are there, everyone...
Biology
Comparison between Self pollination and Cross pollination
Self pollination and Cross pollination:
Major differences
| Self pollination | Cross pollination |
| 1. Pollen grains are transferred to stigma of same or genetically similar flower. | Pollen grains are transferred to stigma of genetically different flower |
| 2. Anthers and stigma mature simultaneously | They mature at different time i.e, protandry and protogyny |
| 3. It occurs in open as well as closed flower | It occurs only in open flower |
| 4. It is very economical for plants | It is not economical as the plant has to produce large number of pollen grains, nectar, scent and colouration |
| 5. External agencies are not required | It depends on external agencies |
| 6. Young ones are homozygous | Young ones are heterozygous |
| 7. It produces pure lines because of the non-occurrence of genetic recombination | It produces variations due to genetic recombination |
| 8. It cannot eliminate harmful traits | It can eliminate harmful traits |
| 9. Useful characters are preserved | Not preserved |
| 10. No adaptability in the changing environment | It provides adaptability |
| 11. It cannot introduce new traits | It can introduce new traits |
| 12. Disease resistance is low | Disease resistance is optimum |
| 13. There is decrease in yield | It increases the yield |
| 14. It does not help in the development of new species | Helps in the development of new species |
- Mutualism
All flowers have mutualistic relationship with bees. In order to make their honey, bees travel from flower to flower collecting nectar. On the other hand, when the bee goes from flower to flower it brings pollen with her, resulting in pollination. The...
- Pollen: Evolution
In this picture is pollen that got stuck to the ground because of juice or water. Pollen has been flying around because plants and flowers are blooming and they are ready to fertilize. Pollen is like a tiny grain inside id a seed plant which usually...
- Stigma (pl Stigmata)
Term: stigmaOrigin: Anc Greek ??????/stigma(=mark, fleck, puncture) >?????/tego(=blotch, spot) originally stigma was a mark or brand on Greek slaves made on skin by burning with a hot iron, distinguishing them from free men.Definition:...
- 2. Sexual Reproduction In Flowering Plants
Click here for PDFAll flowering plants (angiosperms) show sexual reproduction. PRE-FERTILISATION: STRUCTURES & EVENTS- Several hormonal and structural changes are initiated which lead to the differentiation and further development...
- The Perils Of Plant Monogamy
Biology concepts ? pollination, single pollinator, co-evolution, co-divergence What?s bugging her, it?s supposed to be a party!Imagine the best party of the year ? it?s cold outside, but hot inside. The food is great, all your friends are there, everyone...