261550
Which of the following is not a characteristic feature of sponges?
1 Cellular level of organization
2 Body supported by chitin
3 Intracellular digestion
4 Presence of ostia
Explanation:
B Sponges are primitive multicellular animal they have only cellular level of body organization. Body supported by chitin is not a characteristic feature of sponges because sponges body is supported by spicules that made of calcium or silica or proteinaceous spongin fibers. Ostia are the inhalant pores in sponges through which water enters the body. Nutrition in sponges is intracellular. Development in sponges is indirect through larval stages known as parenchymula and Amphiblastula. - Chitin is present in the cell wall of fungi.
AP EAPCET-07.09.2021 Shift-I
Animal kingdom
261551
A sponge harmful to oyster industry is
1 Cliona
2 Euspongia
3 Sponailla
4 Hyalonema
Explanation:
A Cliona (boring sponges) is a genus of Demospongiae in the family clionaidae. It is found worldwide. These sponges mostly live on reefs and lagoons. They are harmful to the oyster industry because they create round holes on the shells of oysters.
AP EAMCET-24.09.2020 Shift-I MGIMS Wardha-2008
Animal kingdom
261564
The canal system is a characteristic feature of
1 echinoderms
2 helminthes
3 coelenterates
4 sponges
Explanation:
D The canal system is a characteristic feature of sponges, belong to phylum porifera. It is also called an aquiferous system. The canal system of sponges acts as a water circulatory system. It helps in food acquisition, respiration and excretion. In porifera canal system is of three types e.g. Asconoid, syconoid and leuconoid.
JIPMER-2011 / Punjab MET-2010
Animal kingdom
261552
The outer chitinous layer of the gemmule of a sponge is secreted by
1 choanocytes
2 interstitial cells
3 amoebocytes
4 archaeocytes
Explanation:
C The outer chitinous layer of the gemmule of a sponge is secreted by amoebocytes. - An amoebocyte is a cell with motility, it move and surround the central mass of archaeocytes and it secrete thick hard chitinuous inner layer and an outer membranous layer around archaeocytes that forms layer Amoebocytes have a variety of functions delivering nutrients from choancytes to other cells within the sponge, giving rise to eggs for sexual reproduction.
261550
Which of the following is not a characteristic feature of sponges?
1 Cellular level of organization
2 Body supported by chitin
3 Intracellular digestion
4 Presence of ostia
Explanation:
B Sponges are primitive multicellular animal they have only cellular level of body organization. Body supported by chitin is not a characteristic feature of sponges because sponges body is supported by spicules that made of calcium or silica or proteinaceous spongin fibers. Ostia are the inhalant pores in sponges through which water enters the body. Nutrition in sponges is intracellular. Development in sponges is indirect through larval stages known as parenchymula and Amphiblastula. - Chitin is present in the cell wall of fungi.
AP EAPCET-07.09.2021 Shift-I
Animal kingdom
261551
A sponge harmful to oyster industry is
1 Cliona
2 Euspongia
3 Sponailla
4 Hyalonema
Explanation:
A Cliona (boring sponges) is a genus of Demospongiae in the family clionaidae. It is found worldwide. These sponges mostly live on reefs and lagoons. They are harmful to the oyster industry because they create round holes on the shells of oysters.
AP EAMCET-24.09.2020 Shift-I MGIMS Wardha-2008
Animal kingdom
261564
The canal system is a characteristic feature of
1 echinoderms
2 helminthes
3 coelenterates
4 sponges
Explanation:
D The canal system is a characteristic feature of sponges, belong to phylum porifera. It is also called an aquiferous system. The canal system of sponges acts as a water circulatory system. It helps in food acquisition, respiration and excretion. In porifera canal system is of three types e.g. Asconoid, syconoid and leuconoid.
JIPMER-2011 / Punjab MET-2010
Animal kingdom
261552
The outer chitinous layer of the gemmule of a sponge is secreted by
1 choanocytes
2 interstitial cells
3 amoebocytes
4 archaeocytes
Explanation:
C The outer chitinous layer of the gemmule of a sponge is secreted by amoebocytes. - An amoebocyte is a cell with motility, it move and surround the central mass of archaeocytes and it secrete thick hard chitinuous inner layer and an outer membranous layer around archaeocytes that forms layer Amoebocytes have a variety of functions delivering nutrients from choancytes to other cells within the sponge, giving rise to eggs for sexual reproduction.
261550
Which of the following is not a characteristic feature of sponges?
1 Cellular level of organization
2 Body supported by chitin
3 Intracellular digestion
4 Presence of ostia
Explanation:
B Sponges are primitive multicellular animal they have only cellular level of body organization. Body supported by chitin is not a characteristic feature of sponges because sponges body is supported by spicules that made of calcium or silica or proteinaceous spongin fibers. Ostia are the inhalant pores in sponges through which water enters the body. Nutrition in sponges is intracellular. Development in sponges is indirect through larval stages known as parenchymula and Amphiblastula. - Chitin is present in the cell wall of fungi.
AP EAPCET-07.09.2021 Shift-I
Animal kingdom
261551
A sponge harmful to oyster industry is
1 Cliona
2 Euspongia
3 Sponailla
4 Hyalonema
Explanation:
A Cliona (boring sponges) is a genus of Demospongiae in the family clionaidae. It is found worldwide. These sponges mostly live on reefs and lagoons. They are harmful to the oyster industry because they create round holes on the shells of oysters.
AP EAMCET-24.09.2020 Shift-I MGIMS Wardha-2008
Animal kingdom
261564
The canal system is a characteristic feature of
1 echinoderms
2 helminthes
3 coelenterates
4 sponges
Explanation:
D The canal system is a characteristic feature of sponges, belong to phylum porifera. It is also called an aquiferous system. The canal system of sponges acts as a water circulatory system. It helps in food acquisition, respiration and excretion. In porifera canal system is of three types e.g. Asconoid, syconoid and leuconoid.
JIPMER-2011 / Punjab MET-2010
Animal kingdom
261552
The outer chitinous layer of the gemmule of a sponge is secreted by
1 choanocytes
2 interstitial cells
3 amoebocytes
4 archaeocytes
Explanation:
C The outer chitinous layer of the gemmule of a sponge is secreted by amoebocytes. - An amoebocyte is a cell with motility, it move and surround the central mass of archaeocytes and it secrete thick hard chitinuous inner layer and an outer membranous layer around archaeocytes that forms layer Amoebocytes have a variety of functions delivering nutrients from choancytes to other cells within the sponge, giving rise to eggs for sexual reproduction.
261550
Which of the following is not a characteristic feature of sponges?
1 Cellular level of organization
2 Body supported by chitin
3 Intracellular digestion
4 Presence of ostia
Explanation:
B Sponges are primitive multicellular animal they have only cellular level of body organization. Body supported by chitin is not a characteristic feature of sponges because sponges body is supported by spicules that made of calcium or silica or proteinaceous spongin fibers. Ostia are the inhalant pores in sponges through which water enters the body. Nutrition in sponges is intracellular. Development in sponges is indirect through larval stages known as parenchymula and Amphiblastula. - Chitin is present in the cell wall of fungi.
AP EAPCET-07.09.2021 Shift-I
Animal kingdom
261551
A sponge harmful to oyster industry is
1 Cliona
2 Euspongia
3 Sponailla
4 Hyalonema
Explanation:
A Cliona (boring sponges) is a genus of Demospongiae in the family clionaidae. It is found worldwide. These sponges mostly live on reefs and lagoons. They are harmful to the oyster industry because they create round holes on the shells of oysters.
AP EAMCET-24.09.2020 Shift-I MGIMS Wardha-2008
Animal kingdom
261564
The canal system is a characteristic feature of
1 echinoderms
2 helminthes
3 coelenterates
4 sponges
Explanation:
D The canal system is a characteristic feature of sponges, belong to phylum porifera. It is also called an aquiferous system. The canal system of sponges acts as a water circulatory system. It helps in food acquisition, respiration and excretion. In porifera canal system is of three types e.g. Asconoid, syconoid and leuconoid.
JIPMER-2011 / Punjab MET-2010
Animal kingdom
261552
The outer chitinous layer of the gemmule of a sponge is secreted by
1 choanocytes
2 interstitial cells
3 amoebocytes
4 archaeocytes
Explanation:
C The outer chitinous layer of the gemmule of a sponge is secreted by amoebocytes. - An amoebocyte is a cell with motility, it move and surround the central mass of archaeocytes and it secrete thick hard chitinuous inner layer and an outer membranous layer around archaeocytes that forms layer Amoebocytes have a variety of functions delivering nutrients from choancytes to other cells within the sponge, giving rise to eggs for sexual reproduction.
