look..i'm not really good in english..but i really2 need help here..why jellyfish must be in buoyancy of water group???
I rephrased your question: Why are jellyfish buoyant?
http://www.google.com/search?hl=en&as_q=why+jellyfish+are+buoyant&as_epq=&as_oq=&as_eq=&num=10&lr=&as_filetype=&ft=i&as_sitesearch=&as_qdr=all&as_rights=&as_occt=any&cr=&as_nlo=&as_nhi=&safe=images
Read several of these articles.
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When jellyfish reach adulthood they are about 95% water, so they are about the same density as water. That's why they float. Hope that's the answer you're looking for. :)
thanks 4 help..what time is it at ur place?nice 2 meet u..bye..
The time you see for each post on this message board is Eastern time in the US (for example, the time in New York).
For learning English:
English is a complicated language with rules and exceptions to rules. Therefore, it is important to immerse yourself in the language. Watch TV, listen to others speaking, listen to English songs, and find someone who speaks the language to help you. And read, read, read. In addition, it's best if you avoid the text-message type of writing, such as "4" for "for" and "2" for "to" and "u" for "you."
Type "ESL" in your web browser, and you will find many free resources for reading and writing English, but nothing is as beneficial to learning to speak English as actually speaking to English-speaking people.
Here are some examples of the resources you'll find online. There are many more.
http://www.esl-lab.com/
http://iteslj.org/v/e/
http://esl.about.com/od/beginningvocabulary/Beginning_Level_English_Vocabulary_Resources.htm
http://esl.about.com/library/lessons/blgr_beginner_review1.htm
http://a4esl.org/
http://www.eslgold.com/
http://www.eslcafe.com/students/
We usually answer specific questions about some aspect of English. That is how we can be most helpful.
No problem! I'll explain it to you step by step.
Jellyfish have a unique body structure that allows them to be a part of the buoyancy of water group. Let's break it down:
1. Understanding buoyancy: Buoyancy is the force exerted on an object by a fluid (in this case, water) that opposes the weight of the object. It determines whether an object sinks or floats in water.
2. Body structure of jellyfish: Jellyfish have a gelatinous, bell-shaped structure called a bell or umbrella. This bell contains a lot of water, which gives it the ability to float and move in water.
3. Nematocysts and tentacles: Jellyfish have tentacles hanging down from their bell, which are used for capturing prey and defense. These tentacles are armed with specialized cells called nematocysts, which contain venomous harpoons to stun or kill their prey.
4. Importance of water for jellyfish: The gelatinous nature of jellyfish requires them to be in a buoyant environment like water to support their body structure. In water, the buoyant force counteracts the weight of the jellyfish, allowing it to float. If a jellyfish is out of the water, its body would collapse under its own weight due to gravity.
5. Jellyfish movement: Jellyfish rely on the water's buoyancy to move. They pulsate their bell-shaped body, which propels them through the water in an up-and-down motion. This movement is achieved by contracting their muscles, expelling water from the bell, and generating a force to push themselves forward.
So, in summary, jellyfish need to be in the buoyancy of water group because their gelatinous body structure requires water to maintain their shape and enable movement. Without water, they would lose their buoyancy and be unable to survive.