the question is whena jellyfish is removed from its slat water environment and put into fresh water it swells and birst. do you think a jellyfish is a plant or animal? and why? if you really wanna help you can tell me why the jellyfish burst! haha thanks so much!
2007-02-12 07:05:27 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Botany
Phylum Cnidaria: (jellyfish, coral, Hydra, sea anemone, Portuguese-man-of-war)
Cnidarians contain 2 body shapes: The polyp which is a cylindrical structure with tentacles at the top of the animal. The medusa is an umbrella shaped structure with its tentacles near the bottom of the animal.
They contain tentacles with special stinging cells called nematocysts. These nematocysts come in a variety of structures. They are activated by touch and can only be used once. They function in protecting the animal and helping capture its food. The cnidocytes are the cells that produce the nematocysts.
They contain 2 cell layers: the ectoderm or outer cell layer and the endoderm the inner cell layer.
These 2 layers are separated by a jelly-like layer called the mesoglea.
Within the mesoglea we find a nerve net. These organisms do not contain a brain. .
They contain a central cavity called the Gastrovascular cavity. Digestion takes place here and the contents are absorbed by the endodermal cells. The undigested food is expelled through its mouth. This is considered a two way digestive process.
They contain radial symmetry. Some organisms are sessile while others are free floating.
They reproduce by budding and regeneration. They also reproduce sexually. They contain both male and female reproductive structures in the same body. They are neither male or female, they are called hermaphroditic.
Many of these organisms are marine though some ( Hydra) are fresh water .
Concentration gradient: is a regular concentration change over a distance in a particular direction.
The net directional movement is away from the center of concentration. Diffusion is the net movement down the concentration gradient. Diffusion is caused by the following natural occurrences: thermal motion ( movement caused by the loss of heat ), random molecular movement, and an increase in entropy of the system. In a solution of many different substances each substance diffuses down its own concentration gradient independent of the others. Diffusion is a passive type of transport, it requires no additional energy to make it work. Osmosis is diffusion of water across a biological membrane.
Solutions: A solution is a mixture of a solute ( thing being dissolved) and a solvent ( thing doing the dissolving). Water is usually the solvent, hence the term aqueous solution.
Types of Aqueous Solutions:
1. Hyperosmotic: solution with the greater concentration of solute ( salt water compared to fresh water). If a cell from a salt water fish is placed in a beaker of fresh water, the cell is said to be hyperosmotic to the water.
2. Hypoosmotic: solution with a lesser concentration of solute ( fresh water compared to salt water). If a cell from a fresh water fish is placed into a beaker of salt water, the cell is said to be hypoosmotic to the water.
3. Isosmotic: solutions of equal solute concentrations are said to be isosmotic.
Water balance in a living cell:
1. Cells placed in a hyperosmotic environment ( salt water) animal cells crenate (shrivel). Plant cells plasmolyze (shrivel).
2. Cells placed in a hypoosmotic environment ( fresh water) animal cells lyse ( explode) and plant cell become turgid (firm).
3. Cells placed in an isosmotic solution animal cells are normal, plant cells are flaccid (limp).
2007-02-15 05:37:40 · answer #1 · answered by ATP-Man 7 · 0⤊ 0⤋
Hi frou...(been a rough couple years lol) Dont know that I am back, but am for a time anyway. As a devout christian ( I know, here we go again, yes?) and speaking for myself, I find the study of these subjects interesting. even fascinating. In my healthier days, before the spina bifida caught up with me, I prepared herbal teas for folk's ailments . I learned how primarily from two people. My grandfather, and my greatgrammie's sister, who was native american. Dont think I even knew the word biology for quite a few years after Grampa started teaching me at about the age of six or seven. When I realized the "borrowed time" aspect of my life was catching up with me I brought as many herbs home from the woods and fields and started a garden out back. And yes, there were several that could not adapt and still needed to be foraged. Did not hear the word psychology till even after I heard biology ( was introduced to biology in high school and loved the study of it ) Again , it had no impact on me except I could say, "oh that's what they call it" Interesting but all the therapy or introspect I ever needed or will need , for me, is found in the Bible where the one who is the first and greatest counciler of all, and for all times, is to be found as is the answer to every question or problem I ever, ever had or will have. I feel that for some people psychology can be a tremendous help and as for myself, I confess to calling pastor a time and again even for a shoulder to cry on. Thing is tho, psychology, in my opinion, has become abused and caused more problems then the ones that caused folks to seek help in the first place. Also many people who desperately feel they need that help cannot find it for lack of funds. Thing that intriques me most is that those same folks give up on themselves and life for the lack of psychologists. Sad. I do run on , dont I dear? LOL Hope you have been well and happy during my vaca from comps. Penumbra
2016-05-24 01:52:13 · answer #2 · answered by ? 4 · 0⤊ 0⤋
jelly fish are aminals, they are invertabrates, meaning that they have no backbone. also it is generally accepted that jellyfish might actually be a complex colony of smaller organisms living symbyotically. they are made of cell just as we are and cells like to be "balanced" inside and out so if there is more salt in cell the cell sucks up water trying to equalize. this also works the other way, if you putthe jellyfish in super concentrated salt water, the cell would start loosing water trying to equalize and the jelly would shrivel up.
2007-02-12 07:48:47 · answer #3 · answered by Bio-student Again(aka nursegirl) 4 · 0⤊ 0⤋
Yes jellyfish are animals. It burst in fresh water because its density in fresh water causes it to swell.
2007-02-16 06:54:19 · answer #4 · answered by eiplanner 3 · 0⤊ 0⤋
when any water requiring organism requires water and doesn't get it that organism will experience plasmolysis and shrivel because the organism like said above me must be balanced, though i am not sure why the jellyfish would"blow up" because a higher salt than water concentration would cause the cell to shrivel up
2007-02-12 09:06:03 · answer #5 · answered by sensimella 1 · 0⤊ 1⤋
jelly fishes are animals
water rushes in to balance the concentration of salt within the jelly fish in ratio to the fresh water environment
it is called Diffusion
2007-02-12 07:08:31 · answer #6 · answered by Anonymous · 0⤊ 1⤋