261642
The poisonous fluid present in nematocysts of Hydra is:
1 toxin
2 venom
3 hematin
4 hypnotoxin
Explanation:
D Nematocysts are venom-containing stinging organelles located in cnidocytes in cnidarians. The poisonous fluid present in nematocysts of Hydra is hypnotoxin. Hypnotoxin is a mixture of protein and phenol. This fluid is injected in the body of prey with the help of pointed needle shaped structure called barb \& spicules. Hypnotoxin can't kill the prey, it only paralyzes. The nematocyst is used for defence response of Hydra. Any poisonous substance is called toxin. Venom is a toxin which is present in some animals such as snakes, bees, scorpion, etc.
AMU-2006
Animal kingdom
261643
Metagenesis refers to :
1 Presence of a segmented body and parthenogenetic mode of reproduction
2 Presence of different morphic forms
3 Alternation of generation between asexual and sexual phases of an organism
4 Occurrence of a drastic change in form during post-embryonic development
Explanation:
C Metagenesis refers to the alternation of generation between sexual and asexual phases of an organism during its life cycle. - In coelenterates, metagenesis is alternation of generation between polyp and medusa phase. Polyp reproduces asexually by budding to form medusa and medusa reproduces sexually to form polyp. - Metagenesis and metamorphosis both term are different in mutagenesis. Metagenesis is alternation of generation but in metamorphosis organism produce distinct stages during its life cycle like egg, larva, pupa and adult.
AIPMT (Re-Exam)-2015
Animal kingdom
261644
Select the Taxon mentioned that represents both marine and fresh water species.
1 Echinoderms
2 Ctenophora
3 Cephalochordata
4 Cnidaria
Explanation:
D Cnidaria phylum is notable in the animal kingdom for exhibiting polymorphism. Most of them are marine and other are fresh water. Example- fresh water cnidarian Hydra and marine cnidarians - Jellyfish, sea anemones, sea fans etc. While members of ctenophora, cephalochordata, echinodermata are found exclusively in the marine environment.
AIPMT-2014
Animal kingdom
261645
Which one of the following living organisms completely lacks a cell wall?
1 Cyanobacteria
2 Sea- fan (Gorgonia)
3 Saccharmyces
4 Blue-green algae
Explanation:
B Sea - fan (Gorgonia) belongs to cnidaria class-Anthozoa. They are also known as sea whips or sea fans and are similar to the sea pen, a soft coral. These marine invertebrates are multi-cellular, have no cell walls. - BGA belong to monera \& their cell wall is made up of peptidoglycan. - Saccharomyces fungi cell wall is made up of chitin.
AIPMT-2014
Animal kingdom
261647
Absence of circulatory system in Hydra is compensated by
1 pseudocoelomic fluid
2 gastrovascular cavity
3 presence of tentacles
4 none of the above
Explanation:
B Absence of circulatory system in Hydra is compensated by gastrovascular cavity, it is the primary digestive organ in mojar animal phyla. Hydra have a fluid filled cavity called gastrovascular cavity that absorbed nutrients. The Hydra gets oxygen from the water that entered the cavity and gets rid of carbon dioxide through this cavity. They do not have a complete circulatory system i.e. contain only one opening.
261642
The poisonous fluid present in nematocysts of Hydra is:
1 toxin
2 venom
3 hematin
4 hypnotoxin
Explanation:
D Nematocysts are venom-containing stinging organelles located in cnidocytes in cnidarians. The poisonous fluid present in nematocysts of Hydra is hypnotoxin. Hypnotoxin is a mixture of protein and phenol. This fluid is injected in the body of prey with the help of pointed needle shaped structure called barb \& spicules. Hypnotoxin can't kill the prey, it only paralyzes. The nematocyst is used for defence response of Hydra. Any poisonous substance is called toxin. Venom is a toxin which is present in some animals such as snakes, bees, scorpion, etc.
AMU-2006
Animal kingdom
261643
Metagenesis refers to :
1 Presence of a segmented body and parthenogenetic mode of reproduction
2 Presence of different morphic forms
3 Alternation of generation between asexual and sexual phases of an organism
4 Occurrence of a drastic change in form during post-embryonic development
Explanation:
C Metagenesis refers to the alternation of generation between sexual and asexual phases of an organism during its life cycle. - In coelenterates, metagenesis is alternation of generation between polyp and medusa phase. Polyp reproduces asexually by budding to form medusa and medusa reproduces sexually to form polyp. - Metagenesis and metamorphosis both term are different in mutagenesis. Metagenesis is alternation of generation but in metamorphosis organism produce distinct stages during its life cycle like egg, larva, pupa and adult.
AIPMT (Re-Exam)-2015
Animal kingdom
261644
Select the Taxon mentioned that represents both marine and fresh water species.
1 Echinoderms
2 Ctenophora
3 Cephalochordata
4 Cnidaria
Explanation:
D Cnidaria phylum is notable in the animal kingdom for exhibiting polymorphism. Most of them are marine and other are fresh water. Example- fresh water cnidarian Hydra and marine cnidarians - Jellyfish, sea anemones, sea fans etc. While members of ctenophora, cephalochordata, echinodermata are found exclusively in the marine environment.
AIPMT-2014
Animal kingdom
261645
Which one of the following living organisms completely lacks a cell wall?
1 Cyanobacteria
2 Sea- fan (Gorgonia)
3 Saccharmyces
4 Blue-green algae
Explanation:
B Sea - fan (Gorgonia) belongs to cnidaria class-Anthozoa. They are also known as sea whips or sea fans and are similar to the sea pen, a soft coral. These marine invertebrates are multi-cellular, have no cell walls. - BGA belong to monera \& their cell wall is made up of peptidoglycan. - Saccharomyces fungi cell wall is made up of chitin.
AIPMT-2014
Animal kingdom
261647
Absence of circulatory system in Hydra is compensated by
1 pseudocoelomic fluid
2 gastrovascular cavity
3 presence of tentacles
4 none of the above
Explanation:
B Absence of circulatory system in Hydra is compensated by gastrovascular cavity, it is the primary digestive organ in mojar animal phyla. Hydra have a fluid filled cavity called gastrovascular cavity that absorbed nutrients. The Hydra gets oxygen from the water that entered the cavity and gets rid of carbon dioxide through this cavity. They do not have a complete circulatory system i.e. contain only one opening.
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Animal kingdom
261642
The poisonous fluid present in nematocysts of Hydra is:
1 toxin
2 venom
3 hematin
4 hypnotoxin
Explanation:
D Nematocysts are venom-containing stinging organelles located in cnidocytes in cnidarians. The poisonous fluid present in nematocysts of Hydra is hypnotoxin. Hypnotoxin is a mixture of protein and phenol. This fluid is injected in the body of prey with the help of pointed needle shaped structure called barb \& spicules. Hypnotoxin can't kill the prey, it only paralyzes. The nematocyst is used for defence response of Hydra. Any poisonous substance is called toxin. Venom is a toxin which is present in some animals such as snakes, bees, scorpion, etc.
AMU-2006
Animal kingdom
261643
Metagenesis refers to :
1 Presence of a segmented body and parthenogenetic mode of reproduction
2 Presence of different morphic forms
3 Alternation of generation between asexual and sexual phases of an organism
4 Occurrence of a drastic change in form during post-embryonic development
Explanation:
C Metagenesis refers to the alternation of generation between sexual and asexual phases of an organism during its life cycle. - In coelenterates, metagenesis is alternation of generation between polyp and medusa phase. Polyp reproduces asexually by budding to form medusa and medusa reproduces sexually to form polyp. - Metagenesis and metamorphosis both term are different in mutagenesis. Metagenesis is alternation of generation but in metamorphosis organism produce distinct stages during its life cycle like egg, larva, pupa and adult.
AIPMT (Re-Exam)-2015
Animal kingdom
261644
Select the Taxon mentioned that represents both marine and fresh water species.
1 Echinoderms
2 Ctenophora
3 Cephalochordata
4 Cnidaria
Explanation:
D Cnidaria phylum is notable in the animal kingdom for exhibiting polymorphism. Most of them are marine and other are fresh water. Example- fresh water cnidarian Hydra and marine cnidarians - Jellyfish, sea anemones, sea fans etc. While members of ctenophora, cephalochordata, echinodermata are found exclusively in the marine environment.
AIPMT-2014
Animal kingdom
261645
Which one of the following living organisms completely lacks a cell wall?
1 Cyanobacteria
2 Sea- fan (Gorgonia)
3 Saccharmyces
4 Blue-green algae
Explanation:
B Sea - fan (Gorgonia) belongs to cnidaria class-Anthozoa. They are also known as sea whips or sea fans and are similar to the sea pen, a soft coral. These marine invertebrates are multi-cellular, have no cell walls. - BGA belong to monera \& their cell wall is made up of peptidoglycan. - Saccharomyces fungi cell wall is made up of chitin.
AIPMT-2014
Animal kingdom
261647
Absence of circulatory system in Hydra is compensated by
1 pseudocoelomic fluid
2 gastrovascular cavity
3 presence of tentacles
4 none of the above
Explanation:
B Absence of circulatory system in Hydra is compensated by gastrovascular cavity, it is the primary digestive organ in mojar animal phyla. Hydra have a fluid filled cavity called gastrovascular cavity that absorbed nutrients. The Hydra gets oxygen from the water that entered the cavity and gets rid of carbon dioxide through this cavity. They do not have a complete circulatory system i.e. contain only one opening.
261642
The poisonous fluid present in nematocysts of Hydra is:
1 toxin
2 venom
3 hematin
4 hypnotoxin
Explanation:
D Nematocysts are venom-containing stinging organelles located in cnidocytes in cnidarians. The poisonous fluid present in nematocysts of Hydra is hypnotoxin. Hypnotoxin is a mixture of protein and phenol. This fluid is injected in the body of prey with the help of pointed needle shaped structure called barb \& spicules. Hypnotoxin can't kill the prey, it only paralyzes. The nematocyst is used for defence response of Hydra. Any poisonous substance is called toxin. Venom is a toxin which is present in some animals such as snakes, bees, scorpion, etc.
AMU-2006
Animal kingdom
261643
Metagenesis refers to :
1 Presence of a segmented body and parthenogenetic mode of reproduction
2 Presence of different morphic forms
3 Alternation of generation between asexual and sexual phases of an organism
4 Occurrence of a drastic change in form during post-embryonic development
Explanation:
C Metagenesis refers to the alternation of generation between sexual and asexual phases of an organism during its life cycle. - In coelenterates, metagenesis is alternation of generation between polyp and medusa phase. Polyp reproduces asexually by budding to form medusa and medusa reproduces sexually to form polyp. - Metagenesis and metamorphosis both term are different in mutagenesis. Metagenesis is alternation of generation but in metamorphosis organism produce distinct stages during its life cycle like egg, larva, pupa and adult.
AIPMT (Re-Exam)-2015
Animal kingdom
261644
Select the Taxon mentioned that represents both marine and fresh water species.
1 Echinoderms
2 Ctenophora
3 Cephalochordata
4 Cnidaria
Explanation:
D Cnidaria phylum is notable in the animal kingdom for exhibiting polymorphism. Most of them are marine and other are fresh water. Example- fresh water cnidarian Hydra and marine cnidarians - Jellyfish, sea anemones, sea fans etc. While members of ctenophora, cephalochordata, echinodermata are found exclusively in the marine environment.
AIPMT-2014
Animal kingdom
261645
Which one of the following living organisms completely lacks a cell wall?
1 Cyanobacteria
2 Sea- fan (Gorgonia)
3 Saccharmyces
4 Blue-green algae
Explanation:
B Sea - fan (Gorgonia) belongs to cnidaria class-Anthozoa. They are also known as sea whips or sea fans and are similar to the sea pen, a soft coral. These marine invertebrates are multi-cellular, have no cell walls. - BGA belong to monera \& their cell wall is made up of peptidoglycan. - Saccharomyces fungi cell wall is made up of chitin.
AIPMT-2014
Animal kingdom
261647
Absence of circulatory system in Hydra is compensated by
1 pseudocoelomic fluid
2 gastrovascular cavity
3 presence of tentacles
4 none of the above
Explanation:
B Absence of circulatory system in Hydra is compensated by gastrovascular cavity, it is the primary digestive organ in mojar animal phyla. Hydra have a fluid filled cavity called gastrovascular cavity that absorbed nutrients. The Hydra gets oxygen from the water that entered the cavity and gets rid of carbon dioxide through this cavity. They do not have a complete circulatory system i.e. contain only one opening.
261642
The poisonous fluid present in nematocysts of Hydra is:
1 toxin
2 venom
3 hematin
4 hypnotoxin
Explanation:
D Nematocysts are venom-containing stinging organelles located in cnidocytes in cnidarians. The poisonous fluid present in nematocysts of Hydra is hypnotoxin. Hypnotoxin is a mixture of protein and phenol. This fluid is injected in the body of prey with the help of pointed needle shaped structure called barb \& spicules. Hypnotoxin can't kill the prey, it only paralyzes. The nematocyst is used for defence response of Hydra. Any poisonous substance is called toxin. Venom is a toxin which is present in some animals such as snakes, bees, scorpion, etc.
AMU-2006
Animal kingdom
261643
Metagenesis refers to :
1 Presence of a segmented body and parthenogenetic mode of reproduction
2 Presence of different morphic forms
3 Alternation of generation between asexual and sexual phases of an organism
4 Occurrence of a drastic change in form during post-embryonic development
Explanation:
C Metagenesis refers to the alternation of generation between sexual and asexual phases of an organism during its life cycle. - In coelenterates, metagenesis is alternation of generation between polyp and medusa phase. Polyp reproduces asexually by budding to form medusa and medusa reproduces sexually to form polyp. - Metagenesis and metamorphosis both term are different in mutagenesis. Metagenesis is alternation of generation but in metamorphosis organism produce distinct stages during its life cycle like egg, larva, pupa and adult.
AIPMT (Re-Exam)-2015
Animal kingdom
261644
Select the Taxon mentioned that represents both marine and fresh water species.
1 Echinoderms
2 Ctenophora
3 Cephalochordata
4 Cnidaria
Explanation:
D Cnidaria phylum is notable in the animal kingdom for exhibiting polymorphism. Most of them are marine and other are fresh water. Example- fresh water cnidarian Hydra and marine cnidarians - Jellyfish, sea anemones, sea fans etc. While members of ctenophora, cephalochordata, echinodermata are found exclusively in the marine environment.
AIPMT-2014
Animal kingdom
261645
Which one of the following living organisms completely lacks a cell wall?
1 Cyanobacteria
2 Sea- fan (Gorgonia)
3 Saccharmyces
4 Blue-green algae
Explanation:
B Sea - fan (Gorgonia) belongs to cnidaria class-Anthozoa. They are also known as sea whips or sea fans and are similar to the sea pen, a soft coral. These marine invertebrates are multi-cellular, have no cell walls. - BGA belong to monera \& their cell wall is made up of peptidoglycan. - Saccharomyces fungi cell wall is made up of chitin.
AIPMT-2014
Animal kingdom
261647
Absence of circulatory system in Hydra is compensated by
1 pseudocoelomic fluid
2 gastrovascular cavity
3 presence of tentacles
4 none of the above
Explanation:
B Absence of circulatory system in Hydra is compensated by gastrovascular cavity, it is the primary digestive organ in mojar animal phyla. Hydra have a fluid filled cavity called gastrovascular cavity that absorbed nutrients. The Hydra gets oxygen from the water that entered the cavity and gets rid of carbon dioxide through this cavity. They do not have a complete circulatory system i.e. contain only one opening.