AY Honors/Porifera and Cnidaria/Answer Key - Revision history

W126jep: - Category of AYHAB

2022-07-15T01:06:13Z

- Category of AYHAB

W126jep: Marked this version for translation

2021-04-19T12:35:38Z

Marked this version for translation

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2021-03-19T03:30:43Z

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2020-12-26T02:40:27Z

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Jomegat bot: Jomegat bot moved page Adventist Youth Honors Answer Book/Nature/Porifera and Cnidaria to AY Honors/Porifera and Cnidaria/Answer Key: Bot: Moved page

2020-12-19T20:10:41Z

Jomegat bot moved page AY Honor Porifera and Cnidaria Answer Key to AY Honor Porifera and Cnidaria Answer Key: Bot: Moved page

Jomegat at 14:14, 7 November 2020

2020-11-07T14:14:21Z

W126jep: break lines between text and images

2018-05-14T12:06:25Z

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W126jep at 20:21, 31 May 2017

2017-05-31T20:21:57Z

RABaker96 at 17:59, 20 April 2015

2015-04-20T17:59:34Z

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2015-03-18T20:59:46Z

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 ==References== <!--T:13-->
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 <!-- 1. Why are sponges considered animals? -->
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 The Porifera, or sponges, are multicellular filter-feeders, drawing particles out of the water column and ingesting these for nutrients. The general action of sponges, then, helps categorize them as animals, rather than as plants. However, some scientists argue that Sponges may belong in their own kingdom, due to some unique characteristics. These include the ability of many sponges to group from single cells, forming back into the full set of differentiated cells of a sponge, and the fact that isolated sponge cells cannot live alone for long (unlike colonial animals, like bryozoans, which are cooperative cells, but not necessary to one an other).
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 Sponges have pores (called Ostia) which allow water to pass into their structure, drawn by the action of flagellum on specialized cells (Chanocytes). These Chanocytes are ringed with smaller hair-like structures that filter particles out of the water column, moving these particles into the sponge. Specialized cells (Amebocytes) move within a jelly-like matrix between the outer and inner “skin” of the sponge, and carry out digestion. These cells can also replace other cells, changing form and function as needed. The water that was drawn in the Ostia flows back out another pore, the Osculum.
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 [[Image:Sponge_TMM_0784.jpg|150px]]
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 <!-- 4. What does the name <i>Cnidaria</i> mean? What animals form part of this group? -->
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 <!-- 5. What are ctenopfora? What differentiates them from cnidaria? -->
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 It is generally best not to touch jellyfish washed up on the beach, and particularly not in the water. Remember that the stinging tentacles can be far from the main body of the Jellyfish, so be aware of this when swimming near them, or walking barefoot along the sand. When diving in water where jellies are likely to be encountered, it is best to wear at least a rash guard and a thin hood to reduce exposed skin.
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 Sponges and Cnidaria are all aquatic organisms, with most species being marine.
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 First aid frequently depends upon the type of Jellyfish and the severity of the sting. The first step is to get the victim out of the water. If there is severe allergic reaction, call 911 (or the equivalent emergence service) immediately. Rinse the sting area with seawater or warm water (in some places, it is recommended to use vinegar, and some even suggest urine, but for some types of jellyfish, vinegar or fresh water can reactivate the stinging cells, making the matter worse). There are also commercially available sprays and liquids designed for treatment of Jellyfish stings. Once the wound has been rinsed to stop further stinging and remove the nematocysts, it can be soaked in warm water, or covered with an ice pack, and treated for pain with commercial topical pain relievers.
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 Coral reefs serve as nurseries and living quarters for numerous difference species of marine animals, and thus play a very important role in ecological webs. They also provide shelter against storms to some coastal areas, and are a vital part of tourism in many tropical countries.
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 The Great Barrier Reef, off the coast of Queensland, Australia, is considered the largest coral reef in the world, at more than 1400 miles long, and covers approximately half the total land area of the state of Texas. Other large reefs include the Red Sea coral reef, at more than 1100 miles long, and the Florida Keys reef, at more than 200 miles long.
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-==1. Why are sponges considered animals?== <!--T:2-->
 <!--T:14-->
 The Porifera, or sponges, are multicellular filter-feeders, drawing particles out of the water column and ingesting these for nutrients. The general action of sponges, then, helps categorize them as animals, rather than as plants. However, some scientists argue that Sponges may belong in their own kingdom, due to some unique characteristics. These include the ability of many sponges to group from single cells, forming back into the full set of differentiated cells of a sponge, and the fact that isolated sponge cells cannot live alone for long (unlike colonial animals, like bryozoans, which are cooperative cells, but not necessary to one an other).
-==2. Why are they considered filters?== <!--T:3-->
+<noinclude></translate></noinclude>
 <!--T:15-->
 Sponges have pores (called Ostia) which allow water to pass into their structure, drawn by the action of flagellum on specialized cells (Chanocytes). These Chanocytes are ringed with smaller hair-like structures that filter particles out of the water column, moving these particles into the sponge. Specialized cells (Amebocytes) move within a jelly-like matrix between the outer and inner “skin” of the sponge, and carry out digestion. These cells can also replace other cells, changing form and function as needed. The water that was drawn in the Ostia flows back out another pore, the Osculum.
-==3. Name at least two characteristics of sponges.== <!--T:4-->
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 [[Image:Sponge_TMM_0784.jpg|150px]]
-==4. What does the name <i>Cnidaria</i> mean? What animals form part of this group?== <!--T:5-->
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 <!--T:19-->
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 [[Image:Physalia_physalia_5705.jpg|300px]]
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 [[Image:Ctenophore_still.jpg|300px]]
-==6. What precautions should be taken when finding a jellyfish?== <!--T:7-->
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 <!--T:26-->
 It is generally best not to touch jellyfish washed up on the beach, and particularly not in the water. Remember that the stinging tentacles can be far from the main body of the Jellyfish, so be aware of this when swimming near them, or walking barefoot along the sand. When diving in water where jellies are likely to be encountered, it is best to wear at least a rash guard and a thin hood to reduce exposed skin.
-==7. In what environment do sponges live? Cnidaria?== <!--T:8-->
+<noinclude></translate></noinclude>
 <!--T:27-->
 Sponges and Cnidaria are all aquatic organisms, with most species being marine.
-==8. What can be done if stung by a jellyfish?== <!--T:9-->
+<noinclude></translate></noinclude>
 <!--T:28-->
 First aid frequently depends upon the type of Jellyfish and the severity of the sting. The first step is to get the victim out of the water. If there is severe allergic reaction, call 911 (or the equivalent emergence service) immediately. Rinse the sting area with seawater or warm water (in some places, it is recommended to use vinegar, and some even suggest urine, but for some types of jellyfish, vinegar or fresh water can reactivate the stinging cells, making the matter worse). There are also commercially available sprays and liquids designed for treatment of Jellyfish stings. Once the wound has been rinsed to stop further stinging and remove the nematocysts, it can be soaked in warm water, or covered with an ice pack, and treated for pain with commercial topical pain relievers.
-==9. Draw a jellyfish and identify its main parts.== <!--T:10-->
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 <!--T:29-->
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 [[Image:JellyfishAnatomy.jpg|300px]]
-==10. What is the importance of coral reefs?== <!--T:11-->
+<noinclude></translate></noinclude>
 <!--T:31-->
 Coral reefs serve as nurseries and living quarters for numerous difference species of marine animals, and thus play a very important role in ecological webs. They also provide shelter against storms to some coastal areas, and are a vital part of tourism in many tropical countries.
-==11. What is the biggest coral reef in the world?== <!--T:12-->
+<noinclude></translate></noinclude>
 <!--T:32-->
 The Great Barrier Reef, off the coast of Queensland, Australia, is considered the largest coral reef in the world, at more than 1400 miles long, and covers approximately half the total land area of the state of Texas. Other large reefs include the Red Sea coral reef, at more than 1100 miles long, and the Florida Keys reef, at more than 200 miles long.
 ==References== <!--T:13-->
 [[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]]
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 It is generally best not to touch jellyfish washed up on the beach, and particularly not in the water. Remember that the stinging tentacles can be far from the main body of the Jellyfish, so be aware of this when swimming near them, or walking barefoot along the sand. When diving in water where jellies are likely to be encountered, it is best to wear at least a rash guard and a thin hood to reduce exposed skin.
-==7. In what environment do sponges live in? Cnidaria?== <!--T:8-->
+==7. In what environment do sponges live? Cnidaria?== <!--T:8-->
 <!--T:27-->

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 Examples of True Jellies (Scyphozoa): The Atlantic Sea Nettle, a jellyfish showing clearly the oral arms and the radial and ring canals, two examples of Upside-Down Jellyfish, and two examples of fossilized jellyfish impressions, the first from Texas, the second from Australia.
 [[Image:Chrysaora_quinquecirrha_0554_W.jpg|200px]]
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 <!--T:21-->
 Anthozoa (Corals, Anemones and the like). A Mushroom Coral, a Clonal Anemone, and another anemone.
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 Hydrozoa: A Portuguese Man O' War (Physalia physalia), a hydroid colony of differentiated hodrozoa, acting together.
 [[Image:Physalia_physalia_5705.jpg|300px]]

← Older revision		Revision as of 20:21, 31 May 2017
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AY Honors/Porifera and Cnidaria/Answer Key - Revision history

W126jep: - Category of AYHAB

W126jep: Marked this version for translation

Jomegat bot: Bot: Automated import of articles *** existing text overwritten ***

Jomegat bot: Bot: Automated import of articles *** existing text overwritten ***

Jomegat bot: Jomegat bot moved page Adventist Youth Honors Answer Book/Nature/Porifera and Cnidaria to AY Honors/Porifera and Cnidaria/Answer Key: Bot: Moved page

Jomegat at 14:14, 7 November 2020

W126jep: break lines between text and images

W126jep at 20:21, 31 May 2017

RABaker96 at 17:59, 20 April 2015

W126jep: Marked this version for translation

Jomegat bot: Bot: Automated import of articles * existing text overwritten *

Jomegat bot: Bot: Automated import of articles * existing text overwritten *