What is the mesohyl of sponges?
- It is a sponge cell that is flagellated and brings in water and food into the cell.
- It is the internal body cavity.
- It is a type of sponge cell that carries nutrients to and waste away for sponge cells.
- It is the gel-like substance that delivers nutrients.
Mesohyl is the gel-like substance all sponge cells are suspended within.
Mesohyl is the gel-like substance all sponge cells are suspended within.
Mesohyl is the gel-like substance all sponge cells are suspended within.
Mesohyl is the gel-like substance all sponge cells are suspended within.
Which of the following is a flagellated cell that helps bring water and food into sponge pores?
- ostia
- osculum
- amoebocyte
- choanocyte
Choanocytes are the flagellated cells that draw in water in through the ostia.
Choanocytes are the flagellated cells that draw in water in through the ostia.
Choanocytes are the flagellated cells that draw in water in through the ostia.
Choanocytes are the flagellated cells that draw in water in through the ostia.
Which of the following is the silica or calcium carbonate needle that makes up some sponges' skeleton?
- spicule
- spongin
- amoebocyte
- mesohyl
Spicules are tiny needles made up of silica or calcium carbonate.
Spicules are tiny needles made up of silica or calcium carbonate.
Spicules are tiny needles made up of silica or calcium carbonate.
Spicules are tiny needles made up of silica or calcium carbonate.
What sponge cell is found in the mesohyl that helps bring nutrients to other cells and takes away cellular waste?
- choanocyte
- ostia
- amoebocyte
- osculum
Amoebocytes can move within the mesophyl, delivering nutrients and removing waste.
Amoebocytes can move within the mesophyl, delivering nutrients and removing waste.
Amoebocytes can move within the mesophyl, delivering nutrients and removing waste.
Amoebocytes can move within the mesophyl, delivering nutrients and removing waste.
What is the large opening in a sponge that waste exit?
- osculum
- ostia
- spicule
- spongin
Waste exit the sponge via the osculum.
Waste exit the sponge via the osculum.
Waste exit the sponge via the osculum.
Waste exit the sponge via the osculum.
How does sexual reproduction occur in sponges?
- Sponges are hermaphrodites that produce both egg and sperm, thus they reproduce sexually through self-fertilization.
- A sponge releases sperm, which then enter another sponge via its ostia. The choanocytes deliver the sperm to the eggs, located within the mesohyl, where fertilization then occurs.
- The sponge grows a small bud that slowly disconnects from the main sponge, which then becomes a new individual sponge that swims to a new destination to plant itself.
- The sponge forms a gemmule which is a group of amoebocytes. The gemmule is within a protective coat within the sponge and after development exits the parent sponge to swim and become planted on a rock or coral.
Sponges release sperm and egg into the water where fertilization occurs. The fertilized egg grows into a larva, which swims around for a small time then plants itself in place where it grows into an adult sponge. Budding, shedding, and gemmule formation are modes of asexual reproduction in sponges.
Sponges release sperm and egg into the water where fertilization occurs. The fertilized egg grows into a larva, which swims around for a small time then plants itself in place where it grows into an adult sponge. Budding, shedding, and gemmule formation are modes of asexual reproduction in sponges.
Sponges release sperm and egg into the water where fertilization occurs. The fertilized egg grows into a larva, which swims around for a small time then plants itself in place where it grows into an adult sponge. Budding, shedding, and gemmule formation are modes of asexual reproduction in sponges.
Sponges release sperm and egg into the water where fertilization occurs. The fertilized egg grows into a larva, which swims around for a small time then plants itself in place where it grows into an adult sponge. Budding, shedding, and gemmule formation are modes of asexual reproduction in sponges.
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