Animalscaretips
Would gemmules or larvae be better at distributing a population of sponges through an area? Explain why. Larvae would be better since their flagella enable them to swim away from the parent sponge and produce another sponge in a new location.
- What is difference between Spongules and Spongin?
- Why is hermaphroditism beneficial to sponges even though they do not self fertilize?
- What functions do collar cells perform?
- Which of the following makes up the Spicule skeletons of porifera and corals?
- Why are spongin and spicules important to a sponge?
- What is the function of Amoebocytes in sponges?
- How do sponge larvae differ from adults?
- What are some advantages of forming Gemmules?
- What might be one advantage to hermaphroditism?
- Why are Ostia important to sponges?
- What is the function of the epidermal cells in sponges?
- Why do sponge larvae have cilia?
- How do sponge larvae move?
- How does the skeleton of a sponge differ from that of other animals?
- How does porifera move?
What is difference between Spongules and Spongin?
Spongin is a modified type of collagen protein, and forms the "fibers" or "mortar" that hold spicules together. ... Spicules are the structural components of a sponge, or the "bricks," and the shapes, sizes, and composition are unique for each species.
Why is hermaphroditism beneficial to sponges even though they do not self fertilize?
Why is hermaphroditism beneficial in sponges even though they rarely self-fertilize? They all produce eggs so the rate of successful fertilization is greater than it would be if only half of them produced eggs. ... Larvae; they can swim away from the parent sponge and produce because they have a flagella.
What functions do collar cells perform?
The collar cells serve two purposes. First, they beat their flagella back and forth to force water through the sponge. The water brings in nutrients and oxygen, while it carries out waste and carbon dioxide. Second, the sticky collars of the collar cells pick up tiny bits of food brought in with the water.
Which of the following makes up the Spicule skeletons of porifera and corals?
Spicules are structural elements found in most sponges. Sponge spicules are made of calcium carbonate or silica.
Why are spongin and spicules important to a sponge?
Spongin and spicules provide support and support the soft body parts of the sponges. The spicules give the sponges rigidity and form to the sponges.
What is the function of Amoebocytes in sponges?
Amoebocytes have a variety of functions: delivering nutrients from choanocytes to other cells within the sponge, giving rise to eggs for sexual reproduction (which remain in the mesohyl), delivering phagocytized sperm from choanocytes to eggs, and differentiating into more-specific cell types.
How do sponge larvae differ from adults?
Sponge larvae are able to swim; however, adults are non-motile and spend their life attached to a substratum through a holdfast. ... The presence and composition of spicules and spongin are the differentiating characteristics between the classes of sponges.
What are some advantages of forming Gemmules?
Gemmules are resistant to desiccation (drying out), freezing, and anoxia (lack of oxygen) and can lie around for long periods of time. Gemmules are analogous to a bacterium's endospore and are made up of amoebocytes surrounded by a layer of spicules and can survive conditions that would kill adult sponges.
What might be one advantage to hermaphroditism?
When low population density or low mobility of a species limits the number of potential mates, simultaneous hermaphrodites may have a selective advantage because, first, they are able to adjust the allocation of resources between male and female functions in order to maximize fitness; second, in a hermaphroditic ...
Why are Ostia important to sponges?
Scattered among the pinacoderm are the ostia that allow entry of water into the body of the sponge. These pores have given the sponges their phylum name Porifera—pore-bearers. In some sponges, ostia are formed by porocytes, single tube-shaped cells that act as valves to regulate the flow of water into the spongocoel.
What is the function of the epidermal cells in sponges?
Epidermal cells form the skin on the outside of the sponge. Finally, the amoebocytes exist between the epidermal and collar cells in an area called the mesohyl. They carry out functions of the sponge and help transport nutrients. They also form spicules, which are the sponge's skeletal fibers.
Why do sponge larvae have cilia?
Trapped sperm are delivered to eggs inside the female body, where fertilization takes place. The resulting zygote develops into a larva. Unlike the adult, the larva is motile. It is covered with cilia that propel it through the water.
How do sponge larvae move?
Sponges use the flagella to move when they are larvae. The flagella and collar work together to gather food.
How does the skeleton of a sponge differ from that of other animals?
Sponges build their skeletons using specialized cells that transport and assemble structural beams like construction workers — a novel way of producing a skeleton compared to other animals. ... The cells then push the spicules through the animals' outer surface to raise them up and attach them together.
How does porifera move?
People often think of sponges as plants, rather than being animals. This misconception is due to some of the characteristics of the Porifera (Dawkins 2004). Like plants they do not move, i.e., they are sessile. They stay put in one place stuck to the bottom of the water- either salt or fresh.
