Sunday, September 27, 2009
commons on videos
The first video is pretty cool, i just realized that a bee's sting can hurt people that much.And the ants one is kinda special to me, I only know that ants uses their antenna to socialize with others before I watch this video, the way they work together is so cool! I was amazed by the bee dude, how can he let that much bees stay on him without wearing any thing to protect himself!Normal people could be killed if they sting by that much of bees! The snow geese one is amazing too! They travel that far every winter and come back at spring! It's a hard work! And some of them could be lost on the way to the south or back.The cuttlefish courtship video is nice, the male cuttlefish showed his resbonsibility of his baby. We watched a similar video about bird's courtship during class last week. It's cool, every birds have their own special way to let the female notice he,especially the last example in the video.The last video, which is the other video about migration, it is interest that after the baby wildebeest born 2 days!
Sunday, September 20, 2009
3 videos
Migration
http://www.youtube.com/watch?v=HYM6LqDJLiM
Classical Conditioning
http://www.youtube.com/watch?v=wEDJF5u3inY
Dominance Hierarchies
Monday, September 14, 2009
PREY DEFENSES
Last week, the class covered organisms' ways to protect themselves which was about prey defenses. A lot of preys have their own way to protect themselves from eaten by other organisms as known as the predators.
There are a lot interesting examples on our Earth. Some animals use protect color to trick their predators, such as hare live under danger, their hairs' color turned to khaki which is the color in forest during autumn. Of course, some chameleon species are able to change their skin colors. Different chameleon species are able to change different colors which can include pink, blue, red, orange, green, black, brown, yellow and turquoise. The most common example of self-defense is turtle. It ducks inside it's shell and stays till the danger is gone. Some turtles also squirt out a foul-smelling fluid to deter a predator. That perfectly saves their life for many times! Geckos, are also good at protecting themselves, when they are in danger, or caught by their natural enemy or human, they would cut their tails immediately so they have chance to run away. Yesterday during dinner, I heard that holothuroidea protect themselves by expelling their sticky covariant tubules to entangle predators; and by secreting a poisonous soap-like substance called holothurin into the surrounding water. That is a lot different from other animals. The animals live in desert, their skin and hairs always turn into the color of desert to have a safer life.
There are a lot interesting examples on our Earth. Some animals use protect color to trick their predators, such as hare live under danger, their hairs' color turned to khaki which is the color in forest during autumn. Of course, some chameleon species are able to change their skin colors. Different chameleon species are able to change different colors which can include pink, blue, red, orange, green, black, brown, yellow and turquoise. The most common example of self-defense is turtle. It ducks inside it's shell and stays till the danger is gone. Some turtles also squirt out a foul-smelling fluid to deter a predator. That perfectly saves their life for many times! Geckos, are also good at protecting themselves, when they are in danger, or caught by their natural enemy or human, they would cut their tails immediately so they have chance to run away. Yesterday during dinner, I heard that holothuroidea protect themselves by expelling their sticky covariant tubules to entangle predators; and by secreting a poisonous soap-like substance called holothurin into the surrounding water. That is a lot different from other animals. The animals live in desert, their skin and hairs always turn into the color of desert to have a safer life.
Tuesday, September 8, 2009
The Coexistence of Different Organisms on Earth
In the past week, the class covered the topic on cells which are important for everything that all living things have. Humans and animals are made of cells. All plants or even bread are made of cells.
What I found fascinating is that one thing about cells that is important to remember is that every person in the world began life as one single cell that grew and divided many times to make the trillions of cells in our bodies. In this way and in many other ways, we are all alike. When we run and play, our movements are caused by muscle cells and nerve cells working together. When we speak, get an idea or decide what to say to somebody, brain cells are working. When we digest our food, cells in our mouth, stomach, and intestines are doing their jobs. Our beating heart, breathing, eyesight, hearing, feeling and even sleeping all require cells.
One interesting fact I learned about cell is that our blood contains more than one dozen different kinds of cells. Some blood cells carry oxygen throughout the body, some form blot clots when we get cut, and others protect us from infections and diseases.Not all cells are beneficial to our body. Some cells living in our bodies can be deadly as well. Cancer cells can out-produce itself and destroy our organs as our immune system weakens or as people begin to age.
The beauty of life begins with the forming of cells. I am eager to learn so many more about biology in order to understand the essence of life.
What I found fascinating is that one thing about cells that is important to remember is that every person in the world began life as one single cell that grew and divided many times to make the trillions of cells in our bodies. In this way and in many other ways, we are all alike. When we run and play, our movements are caused by muscle cells and nerve cells working together. When we speak, get an idea or decide what to say to somebody, brain cells are working. When we digest our food, cells in our mouth, stomach, and intestines are doing their jobs. Our beating heart, breathing, eyesight, hearing, feeling and even sleeping all require cells.
One interesting fact I learned about cell is that our blood contains more than one dozen different kinds of cells. Some blood cells carry oxygen throughout the body, some form blot clots when we get cut, and others protect us from infections and diseases.Not all cells are beneficial to our body. Some cells living in our bodies can be deadly as well. Cancer cells can out-produce itself and destroy our organs as our immune system weakens or as people begin to age.
The beauty of life begins with the forming of cells. I am eager to learn so many more about biology in order to understand the essence of life.
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