Wednesday, May 27, 2009
Sunday, February 8, 2009
Bladderworts
Bladderwort is the common name given to the plants of the genus Utricularia. The largest genus of carnivorous plants, it consists of some 215 species [1] which occur in fresh water and wet soil across every continent except Antarctica. Bladderworts are cultivated for their flowers which are often compared with those of snapdragons and orchids.
All Bladderwort are carnivorous, and capture small organisms by means of bladder-like traps. Terrestrial species tend to have tiny traps, and feed on minute prey such as protozoa and rotifers swimming in water-saturated soil. However, in aquatic species such as the Common Bladderwort U. vulgaris, the bladders are large (sometimes exceeding 5 mm in diameter[citation needed]) and can feed on more substantial prey such as water fleas (Daphnia), nematodes and even fish fry, mosquito larvae and young tadpoles. Despite their small size, the traps are extremely sophisticated. When prey animals brush against trigger hairs connected to the trapdoor, it is released and the bladder sucks in the door and the prey, along with the water surrounding it. Once the bladder is full of water, the door closes again, the whole process taking only ten to fifteen thousandths of a second[citation needed].
Bladderworts are unusual and highly specialized plants, and the vegetative organs are not clearly separated into roots, leaves and stems as in most other angiosperms.[2] The bladder traps, conversely, are recognized as one of the most sophisticated structures in the plant kingdom.
All Bladderwort are carnivorous, and capture small organisms by means of bladder-like traps. Terrestrial species tend to have tiny traps, and feed on minute prey such as protozoa and rotifers swimming in water-saturated soil. However, in aquatic species such as the Common Bladderwort U. vulgaris, the bladders are large (sometimes exceeding 5 mm in diameter[citation needed]) and can feed on more substantial prey such as water fleas (Daphnia), nematodes and even fish fry, mosquito larvae and young tadpoles. Despite their small size, the traps are extremely sophisticated. When prey animals brush against trigger hairs connected to the trapdoor, it is released and the bladder sucks in the door and the prey, along with the water surrounding it. Once the bladder is full of water, the door closes again, the whole process taking only ten to fifteen thousandths of a second[citation needed].
Bladderworts are unusual and highly specialized plants, and the vegetative organs are not clearly separated into roots, leaves and stems as in most other angiosperms.[2] The bladder traps, conversely, are recognized as one of the most sophisticated structures in the plant kingdom.
Sunday, February 1, 2009
The holiday
26 of January,which is New Year's Day of the lunar calendar!I had woke up quite early on that day,because i was very excited and very happy!
After i had brush my teeth and wash my face,my mother and my aunt ask my cousin and i go to the kichen to have our breakfast.According to the traditional custom of chinese,we must eat a egg of the breakfast during the New Year.After we finish our breakfast,my mother tell us to change up to our new clothes and we went to the cinema at Bugis to watch a movie!
After watching the movie,we went to our home.The adult is preparingthe lunch,so we play with the "Monopoly"!Very soon,we had to have our lunch!The dish of the lunch is very plentiful and i like it very much!
After i had brush my teeth and wash my face,my mother and my aunt ask my cousin and i go to the kichen to have our breakfast.According to the traditional custom of chinese,we must eat a egg of the breakfast during the New Year.After we finish our breakfast,my mother tell us to change up to our new clothes and we went to the cinema at Bugis to watch a movie!
After watching the movie,we went to our home.The adult is preparingthe lunch,so we play with the "Monopoly"!Very soon,we had to have our lunch!The dish of the lunch is very plentiful and i like it very much!
Sunday, January 18, 2009
A happy day
To day morning,i stay at my house with my cousin.And we was playing the computer games.After about one hour,we was getting boring about playing computer games!And my cousin suggested going to the park and having a rest. “that’s a good idea.” I said. Then we prepared for that!After lunch,the sky turned dark. After that ,is very unluck that it rained heavily.It meant our plan is impossible. What a pity day!
The chinesse New Years is coming!So that my mother told me to stay at home this afternoon for completely cleaning the house! After supper we watched TV program. How happy we were!
The chinesse New Years is coming!So that my mother told me to stay at home this afternoon for completely cleaning the house! After supper we watched TV program. How happy we were!
Friday, January 16, 2009