Sponges have a water transport or canal system. Water enters through minute pores (ostia) in the body wall into a central cavity, spongocoel, from where it goes out through the osculum. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste.
BIOXI04: ANIMAL KINGDOM
332955
A sponge can be distinguished by the presence of
1 Collar cells
2 Coelenteron
3 Choanocytes
4 Both 1 and 3
Explanation:
In sponges, choanocytes or collar cells line the spongocoel and the canals.
BIOXI04: ANIMAL KINGDOM
332956
Which of the following statement is correct without exception for sponges?
1 They all are asymmetrical animals
2 They all are found in marine water only
3 They all have calcareous spicules
4 They all are primitive multicellular animals and have intracellular digestion
Explanation:
All sponges are not in marine water, some like Spongilla are in fresh water. \(90 \%\) of the sponges are asymmetrical but some have radial symmetry. In sponges the spicules can be calcareous or siliceous.
BIOXI04: ANIMAL KINGDOM
332957
Which of the following describes a sponge
1 With water canal system
2 Sexually reproducing by formation of gametes
3 Sexes are separate
4 Both (1) and (2)
Explanation:
Sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individual. Sponges reproduce asexually by fragmentation and sexually by formation of gametes.
NEET Test Series from KOTA - 10 Papers In MS WORD
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BIOXI04: ANIMAL KINGDOM
332954
Canal system in porifera is called
1 Spongocoel
2 Spongocoelem
3 Coelenteron
4 Coelom
Explanation:
Sponges have a water transport or canal system. Water enters through minute pores (ostia) in the body wall into a central cavity, spongocoel, from where it goes out through the osculum. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste.
BIOXI04: ANIMAL KINGDOM
332955
A sponge can be distinguished by the presence of
1 Collar cells
2 Coelenteron
3 Choanocytes
4 Both 1 and 3
Explanation:
In sponges, choanocytes or collar cells line the spongocoel and the canals.
BIOXI04: ANIMAL KINGDOM
332956
Which of the following statement is correct without exception for sponges?
1 They all are asymmetrical animals
2 They all are found in marine water only
3 They all have calcareous spicules
4 They all are primitive multicellular animals and have intracellular digestion
Explanation:
All sponges are not in marine water, some like Spongilla are in fresh water. \(90 \%\) of the sponges are asymmetrical but some have radial symmetry. In sponges the spicules can be calcareous or siliceous.
BIOXI04: ANIMAL KINGDOM
332957
Which of the following describes a sponge
1 With water canal system
2 Sexually reproducing by formation of gametes
3 Sexes are separate
4 Both (1) and (2)
Explanation:
Sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individual. Sponges reproduce asexually by fragmentation and sexually by formation of gametes.
Sponges have a water transport or canal system. Water enters through minute pores (ostia) in the body wall into a central cavity, spongocoel, from where it goes out through the osculum. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste.
BIOXI04: ANIMAL KINGDOM
332955
A sponge can be distinguished by the presence of
1 Collar cells
2 Coelenteron
3 Choanocytes
4 Both 1 and 3
Explanation:
In sponges, choanocytes or collar cells line the spongocoel and the canals.
BIOXI04: ANIMAL KINGDOM
332956
Which of the following statement is correct without exception for sponges?
1 They all are asymmetrical animals
2 They all are found in marine water only
3 They all have calcareous spicules
4 They all are primitive multicellular animals and have intracellular digestion
Explanation:
All sponges are not in marine water, some like Spongilla are in fresh water. \(90 \%\) of the sponges are asymmetrical but some have radial symmetry. In sponges the spicules can be calcareous or siliceous.
BIOXI04: ANIMAL KINGDOM
332957
Which of the following describes a sponge
1 With water canal system
2 Sexually reproducing by formation of gametes
3 Sexes are separate
4 Both (1) and (2)
Explanation:
Sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individual. Sponges reproduce asexually by fragmentation and sexually by formation of gametes.
Sponges have a water transport or canal system. Water enters through minute pores (ostia) in the body wall into a central cavity, spongocoel, from where it goes out through the osculum. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste.
BIOXI04: ANIMAL KINGDOM
332955
A sponge can be distinguished by the presence of
1 Collar cells
2 Coelenteron
3 Choanocytes
4 Both 1 and 3
Explanation:
In sponges, choanocytes or collar cells line the spongocoel and the canals.
BIOXI04: ANIMAL KINGDOM
332956
Which of the following statement is correct without exception for sponges?
1 They all are asymmetrical animals
2 They all are found in marine water only
3 They all have calcareous spicules
4 They all are primitive multicellular animals and have intracellular digestion
Explanation:
All sponges are not in marine water, some like Spongilla are in fresh water. \(90 \%\) of the sponges are asymmetrical but some have radial symmetry. In sponges the spicules can be calcareous or siliceous.
BIOXI04: ANIMAL KINGDOM
332957
Which of the following describes a sponge
1 With water canal system
2 Sexually reproducing by formation of gametes
3 Sexes are separate
4 Both (1) and (2)
Explanation:
Sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individual. Sponges reproduce asexually by fragmentation and sexually by formation of gametes.