D Sponges have evolved from choanoflagellates. In choanoflagellate colonies, every cell can feed. To become a sponge, the majority must abandon feeding as collar cells, lowering feeding potential dramatically.
Manipal-2013
Animal kingdom
261603
Which is the only phylum in the animal kingdom without any nerve cell ?
1 Porifera
2 Coelenterata
3 Annelida
4 Nematoda
Explanation:
A Porifera is the only phylum in the animal kingdom without any nerve cell. They relying on water flow through their canal system for their food and oxygen. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge can cause a local concentration of its body.
AMU-2012
Animal kingdom
261604
Digestion in Leucosolenia and other sponges is
1 Only extracellular
2 Only intracellular
3 First extracellular, then intracellular
4 First intracellular, then extracellular
Explanation:
B Lecucosolenia is a group of Calcareous sponges. They are small-bodies, soft branching and colonial marine sponges. - Sponges have a cellular level of organization and therefore, they do not have any organ system. - Due to the absence of an organ, the digestion is intracellular, digestion occurs in food vascuoles only.
MGIMS Wardha-2011
Animal kingdom
261605
Sponges have originated from
1 ciliate protozoans
2 sporozoan protozoans
3 sarcodine protozoans
4 choanoflagellate protozoans
Explanation:
D Sponges may have originated from flagellated protozoans. The choanocytes of sponges are similar to the choanoflagellate protozoans. The primitive structures of the porifera shows affinities with certain types of protozoans. - Choanoflagellida have a transparent food gathering collar of cytoplasm around the base of the flagellum. - They are solitary and sessile with or without a stalk.
BHU PMT (Screening)-2011
Animal kingdom
261606
Hydra can paralyse prey by
1 nematocysts
2 tentacles
3 mouth
4 None of these
Explanation:
A Nematocyst is the specialized cell present in the tentacles of hydra which also known as cnidocyte. It contains neurotoxin that protects in self-defense and to catch preys. Hydra have four types of nematocysts on their tentacles and ectoderm.
D Sponges have evolved from choanoflagellates. In choanoflagellate colonies, every cell can feed. To become a sponge, the majority must abandon feeding as collar cells, lowering feeding potential dramatically.
Manipal-2013
Animal kingdom
261603
Which is the only phylum in the animal kingdom without any nerve cell ?
1 Porifera
2 Coelenterata
3 Annelida
4 Nematoda
Explanation:
A Porifera is the only phylum in the animal kingdom without any nerve cell. They relying on water flow through their canal system for their food and oxygen. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge can cause a local concentration of its body.
AMU-2012
Animal kingdom
261604
Digestion in Leucosolenia and other sponges is
1 Only extracellular
2 Only intracellular
3 First extracellular, then intracellular
4 First intracellular, then extracellular
Explanation:
B Lecucosolenia is a group of Calcareous sponges. They are small-bodies, soft branching and colonial marine sponges. - Sponges have a cellular level of organization and therefore, they do not have any organ system. - Due to the absence of an organ, the digestion is intracellular, digestion occurs in food vascuoles only.
MGIMS Wardha-2011
Animal kingdom
261605
Sponges have originated from
1 ciliate protozoans
2 sporozoan protozoans
3 sarcodine protozoans
4 choanoflagellate protozoans
Explanation:
D Sponges may have originated from flagellated protozoans. The choanocytes of sponges are similar to the choanoflagellate protozoans. The primitive structures of the porifera shows affinities with certain types of protozoans. - Choanoflagellida have a transparent food gathering collar of cytoplasm around the base of the flagellum. - They are solitary and sessile with or without a stalk.
BHU PMT (Screening)-2011
Animal kingdom
261606
Hydra can paralyse prey by
1 nematocysts
2 tentacles
3 mouth
4 None of these
Explanation:
A Nematocyst is the specialized cell present in the tentacles of hydra which also known as cnidocyte. It contains neurotoxin that protects in self-defense and to catch preys. Hydra have four types of nematocysts on their tentacles and ectoderm.
D Sponges have evolved from choanoflagellates. In choanoflagellate colonies, every cell can feed. To become a sponge, the majority must abandon feeding as collar cells, lowering feeding potential dramatically.
Manipal-2013
Animal kingdom
261603
Which is the only phylum in the animal kingdom without any nerve cell ?
1 Porifera
2 Coelenterata
3 Annelida
4 Nematoda
Explanation:
A Porifera is the only phylum in the animal kingdom without any nerve cell. They relying on water flow through their canal system for their food and oxygen. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge can cause a local concentration of its body.
AMU-2012
Animal kingdom
261604
Digestion in Leucosolenia and other sponges is
1 Only extracellular
2 Only intracellular
3 First extracellular, then intracellular
4 First intracellular, then extracellular
Explanation:
B Lecucosolenia is a group of Calcareous sponges. They are small-bodies, soft branching and colonial marine sponges. - Sponges have a cellular level of organization and therefore, they do not have any organ system. - Due to the absence of an organ, the digestion is intracellular, digestion occurs in food vascuoles only.
MGIMS Wardha-2011
Animal kingdom
261605
Sponges have originated from
1 ciliate protozoans
2 sporozoan protozoans
3 sarcodine protozoans
4 choanoflagellate protozoans
Explanation:
D Sponges may have originated from flagellated protozoans. The choanocytes of sponges are similar to the choanoflagellate protozoans. The primitive structures of the porifera shows affinities with certain types of protozoans. - Choanoflagellida have a transparent food gathering collar of cytoplasm around the base of the flagellum. - They are solitary and sessile with or without a stalk.
BHU PMT (Screening)-2011
Animal kingdom
261606
Hydra can paralyse prey by
1 nematocysts
2 tentacles
3 mouth
4 None of these
Explanation:
A Nematocyst is the specialized cell present in the tentacles of hydra which also known as cnidocyte. It contains neurotoxin that protects in self-defense and to catch preys. Hydra have four types of nematocysts on their tentacles and ectoderm.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Animal kingdom
261598
Sponges have evolved from
1 ciliates
2 flagellates
3 protozoans
4 choanoflagellates
Explanation:
D Sponges have evolved from choanoflagellates. In choanoflagellate colonies, every cell can feed. To become a sponge, the majority must abandon feeding as collar cells, lowering feeding potential dramatically.
Manipal-2013
Animal kingdom
261603
Which is the only phylum in the animal kingdom without any nerve cell ?
1 Porifera
2 Coelenterata
3 Annelida
4 Nematoda
Explanation:
A Porifera is the only phylum in the animal kingdom without any nerve cell. They relying on water flow through their canal system for their food and oxygen. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge can cause a local concentration of its body.
AMU-2012
Animal kingdom
261604
Digestion in Leucosolenia and other sponges is
1 Only extracellular
2 Only intracellular
3 First extracellular, then intracellular
4 First intracellular, then extracellular
Explanation:
B Lecucosolenia is a group of Calcareous sponges. They are small-bodies, soft branching and colonial marine sponges. - Sponges have a cellular level of organization and therefore, they do not have any organ system. - Due to the absence of an organ, the digestion is intracellular, digestion occurs in food vascuoles only.
MGIMS Wardha-2011
Animal kingdom
261605
Sponges have originated from
1 ciliate protozoans
2 sporozoan protozoans
3 sarcodine protozoans
4 choanoflagellate protozoans
Explanation:
D Sponges may have originated from flagellated protozoans. The choanocytes of sponges are similar to the choanoflagellate protozoans. The primitive structures of the porifera shows affinities with certain types of protozoans. - Choanoflagellida have a transparent food gathering collar of cytoplasm around the base of the flagellum. - They are solitary and sessile with or without a stalk.
BHU PMT (Screening)-2011
Animal kingdom
261606
Hydra can paralyse prey by
1 nematocysts
2 tentacles
3 mouth
4 None of these
Explanation:
A Nematocyst is the specialized cell present in the tentacles of hydra which also known as cnidocyte. It contains neurotoxin that protects in self-defense and to catch preys. Hydra have four types of nematocysts on their tentacles and ectoderm.
D Sponges have evolved from choanoflagellates. In choanoflagellate colonies, every cell can feed. To become a sponge, the majority must abandon feeding as collar cells, lowering feeding potential dramatically.
Manipal-2013
Animal kingdom
261603
Which is the only phylum in the animal kingdom without any nerve cell ?
1 Porifera
2 Coelenterata
3 Annelida
4 Nematoda
Explanation:
A Porifera is the only phylum in the animal kingdom without any nerve cell. They relying on water flow through their canal system for their food and oxygen. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge can cause a local concentration of its body.
AMU-2012
Animal kingdom
261604
Digestion in Leucosolenia and other sponges is
1 Only extracellular
2 Only intracellular
3 First extracellular, then intracellular
4 First intracellular, then extracellular
Explanation:
B Lecucosolenia is a group of Calcareous sponges. They are small-bodies, soft branching and colonial marine sponges. - Sponges have a cellular level of organization and therefore, they do not have any organ system. - Due to the absence of an organ, the digestion is intracellular, digestion occurs in food vascuoles only.
MGIMS Wardha-2011
Animal kingdom
261605
Sponges have originated from
1 ciliate protozoans
2 sporozoan protozoans
3 sarcodine protozoans
4 choanoflagellate protozoans
Explanation:
D Sponges may have originated from flagellated protozoans. The choanocytes of sponges are similar to the choanoflagellate protozoans. The primitive structures of the porifera shows affinities with certain types of protozoans. - Choanoflagellida have a transparent food gathering collar of cytoplasm around the base of the flagellum. - They are solitary and sessile with or without a stalk.
BHU PMT (Screening)-2011
Animal kingdom
261606
Hydra can paralyse prey by
1 nematocysts
2 tentacles
3 mouth
4 None of these
Explanation:
A Nematocyst is the specialized cell present in the tentacles of hydra which also known as cnidocyte. It contains neurotoxin that protects in self-defense and to catch preys. Hydra have four types of nematocysts on their tentacles and ectoderm.