261648
Regeneration in Hydra will be faster if it is cut off from
1 tentacles
2 hypostome
3 base
4 all of these
Explanation:
A Regeneration in Hydra will be faster if it is cut off from tentacles compared with other organs like hypostome, base polyp etc. Regeneration is the ability of an organism to replace its lost or damaged body parts. Hydra has great power of regeneration.
UP CPMT-2007
Animal kingdom
261649
Which of the following is not applicable to coelenterate?
1 choanocytes
2 coelenteron
3 radial symmetry
4 nematoblasts.
Explanation:
A Choanocytes is not applicable to coelenterates. Coelenterates have the following characteristic- The presence of choanocytes is a characteristic feature of the phylum porifera. They contain a flagellum surrounded at its base by a thin cytoplasmic collar cell that maintain the flow of food bearing water.
AIIMS-1996
Animal kingdom
261650
Hydra receives impulses and stimuli through
1 Nerve net
2 Nematocytes
3 Sensory cells
4 Neuron cells.
Explanation:
C In hydra, sensory cells are found in the gastrodermis. They are supposed to be stimulated by the entry of the prey into the gastrovascular cavity.
AIIMS-2002
Animal kingdom
261651
Which of the following is correct about nematocyst in Hydra?
1 It can be re-used
2 Its ejection is conditioned reflex
3 It is ejected on contact and pierce the prey
4 Due to which other Hydra doesn't come in contact with it.
Explanation:
C Nematocysts are the stinging cells and are the organs of offence and defense of coelenterates. - Nematocysts contains a poisonous proteinaceous fluid, called hypnotoxin along tube which injects the fluid into the victim. Hypnotoxin can't kill the prey only paralyzes. - Nematocysts are activated in response to chemicals secreted by prey. They explode after coming in contact with the prey.
261648
Regeneration in Hydra will be faster if it is cut off from
1 tentacles
2 hypostome
3 base
4 all of these
Explanation:
A Regeneration in Hydra will be faster if it is cut off from tentacles compared with other organs like hypostome, base polyp etc. Regeneration is the ability of an organism to replace its lost or damaged body parts. Hydra has great power of regeneration.
UP CPMT-2007
Animal kingdom
261649
Which of the following is not applicable to coelenterate?
1 choanocytes
2 coelenteron
3 radial symmetry
4 nematoblasts.
Explanation:
A Choanocytes is not applicable to coelenterates. Coelenterates have the following characteristic- The presence of choanocytes is a characteristic feature of the phylum porifera. They contain a flagellum surrounded at its base by a thin cytoplasmic collar cell that maintain the flow of food bearing water.
AIIMS-1996
Animal kingdom
261650
Hydra receives impulses and stimuli through
1 Nerve net
2 Nematocytes
3 Sensory cells
4 Neuron cells.
Explanation:
C In hydra, sensory cells are found in the gastrodermis. They are supposed to be stimulated by the entry of the prey into the gastrovascular cavity.
AIIMS-2002
Animal kingdom
261651
Which of the following is correct about nematocyst in Hydra?
1 It can be re-used
2 Its ejection is conditioned reflex
3 It is ejected on contact and pierce the prey
4 Due to which other Hydra doesn't come in contact with it.
Explanation:
C Nematocysts are the stinging cells and are the organs of offence and defense of coelenterates. - Nematocysts contains a poisonous proteinaceous fluid, called hypnotoxin along tube which injects the fluid into the victim. Hypnotoxin can't kill the prey only paralyzes. - Nematocysts are activated in response to chemicals secreted by prey. They explode after coming in contact with the prey.
261648
Regeneration in Hydra will be faster if it is cut off from
1 tentacles
2 hypostome
3 base
4 all of these
Explanation:
A Regeneration in Hydra will be faster if it is cut off from tentacles compared with other organs like hypostome, base polyp etc. Regeneration is the ability of an organism to replace its lost or damaged body parts. Hydra has great power of regeneration.
UP CPMT-2007
Animal kingdom
261649
Which of the following is not applicable to coelenterate?
1 choanocytes
2 coelenteron
3 radial symmetry
4 nematoblasts.
Explanation:
A Choanocytes is not applicable to coelenterates. Coelenterates have the following characteristic- The presence of choanocytes is a characteristic feature of the phylum porifera. They contain a flagellum surrounded at its base by a thin cytoplasmic collar cell that maintain the flow of food bearing water.
AIIMS-1996
Animal kingdom
261650
Hydra receives impulses and stimuli through
1 Nerve net
2 Nematocytes
3 Sensory cells
4 Neuron cells.
Explanation:
C In hydra, sensory cells are found in the gastrodermis. They are supposed to be stimulated by the entry of the prey into the gastrovascular cavity.
AIIMS-2002
Animal kingdom
261651
Which of the following is correct about nematocyst in Hydra?
1 It can be re-used
2 Its ejection is conditioned reflex
3 It is ejected on contact and pierce the prey
4 Due to which other Hydra doesn't come in contact with it.
Explanation:
C Nematocysts are the stinging cells and are the organs of offence and defense of coelenterates. - Nematocysts contains a poisonous proteinaceous fluid, called hypnotoxin along tube which injects the fluid into the victim. Hypnotoxin can't kill the prey only paralyzes. - Nematocysts are activated in response to chemicals secreted by prey. They explode after coming in contact with the prey.
261648
Regeneration in Hydra will be faster if it is cut off from
1 tentacles
2 hypostome
3 base
4 all of these
Explanation:
A Regeneration in Hydra will be faster if it is cut off from tentacles compared with other organs like hypostome, base polyp etc. Regeneration is the ability of an organism to replace its lost or damaged body parts. Hydra has great power of regeneration.
UP CPMT-2007
Animal kingdom
261649
Which of the following is not applicable to coelenterate?
1 choanocytes
2 coelenteron
3 radial symmetry
4 nematoblasts.
Explanation:
A Choanocytes is not applicable to coelenterates. Coelenterates have the following characteristic- The presence of choanocytes is a characteristic feature of the phylum porifera. They contain a flagellum surrounded at its base by a thin cytoplasmic collar cell that maintain the flow of food bearing water.
AIIMS-1996
Animal kingdom
261650
Hydra receives impulses and stimuli through
1 Nerve net
2 Nematocytes
3 Sensory cells
4 Neuron cells.
Explanation:
C In hydra, sensory cells are found in the gastrodermis. They are supposed to be stimulated by the entry of the prey into the gastrovascular cavity.
AIIMS-2002
Animal kingdom
261651
Which of the following is correct about nematocyst in Hydra?
1 It can be re-used
2 Its ejection is conditioned reflex
3 It is ejected on contact and pierce the prey
4 Due to which other Hydra doesn't come in contact with it.
Explanation:
C Nematocysts are the stinging cells and are the organs of offence and defense of coelenterates. - Nematocysts contains a poisonous proteinaceous fluid, called hypnotoxin along tube which injects the fluid into the victim. Hypnotoxin can't kill the prey only paralyzes. - Nematocysts are activated in response to chemicals secreted by prey. They explode after coming in contact with the prey.
