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.
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.
