fertilization in sponges is internal or external

Nearly all fish spawn, as do crustaceans (such as crabs and shrimp), mollusks (such as oysters), squid, and echinoderms (such as sea urchins and sea cucumbers). But in most aquatic organisms like fishes, amphibians, etc.

200+ VIEWS. Each body consists of an internal mass of amoebocytes, covered externally by a pinacoderm and spicules. External fertilization. Fertilization in sponges may be either external or internal.

Top Answer. After the sperm reaches the egg, fertilization takes place. Internal fertilization protects the fertilized egg or embryo from predation and harsh environments, which results in higher survival rates than can occur with external fertilization.

Although most sponges are hermaphrodite but cross-fertilization is the rule because eggs and sperms are produced at different times.Oocytes are produced inside the body and remain inside mesogloea waiting for fertilization. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female.Humans provide an example of the former whereas seahorse reproduction is …

47 48 49.

There are three ways that offspring are produced following internal fertilization. The release of the reproductive material may be triggered by water temperature or the length of daylight. Most sponges have internal fertilization, in which eggs inside the animal’s body are fer-tilized by sperm carried into the sponge with water. In Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The trigger for egg and sperm release (spawning) causes the egg and sperm to be placed in a small area, enhancing the possibility of fertilization.External fertilization in an aquatic environment protects the eggs from drying out. (credit: Dan Bennett)During sexual reproduction in toads, the male grasps the female from behind and externally fertilizes the eggs as they are deposited. •Sponges are hermaphrodite as both male and female gametes are produced by the same individual. (b) During sexual reproduction in toads, the male grasps the female from behind and externally fertilizes the eggs as they are deposited. Broadcast spawning can result in a greater mixture of the genes within a group, leading to higher genetic diversity and a greater chance of species survival in a hostile environment. Broadcast spawning can result in a greater mixture of the genes within a group, leading to higher genetic diversity and a greater chance of species survival in a hostile environment.

which the eggs and sperm are both released into the water; fertilization occurs outside the animal's body. B. the sperm is taken in from the surrounding water. Sexual reproduction starts with the combination of a sperm and an egg in a process called fertilization. For sessile aquatic organisms like sponges, broadcast spawning is the only mechanism for fertilization and colonization of new environments. ... 3. can utilize water currents to reproduce with other sponges 4. most are internal fertilization 5. results in the development of a free-swimming larvae 6. freshwater sponges can produce gemmules. Fertilization: The sperms released into the sea water by an individual enter into other sponges and fertilize the ova present in the Mesenchyme of the body wall (in situ fertilization). if so, why?yes, because roundworms are attracted to the plant's root and can also infect fungus. Organizing and providing relevant educational content, resources and information for students.All names, acronyms, logos and trademarks displayed on this website are those of their respective owners. The sperm nucleus then fuses with the nucleus of ovum, ensuring internal fertilization.Early development takes place within maternal sponge body leading to the formation of a larval stage. Therefore, millions of eggs must be produced by individuals, and the offspring produced through this method must mature rapidly. Broadcast spawning can result in a greater mixture of the genes within a group, leading to higher genetic diversity and a greater chance of species survival in a hostile environment.

Fertilization is in-situ.

Internal fertilization enhances the fertilization of eggs by a specific male. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female.Humans provide an example of the former whereas seahorse reproduction is … Though some unisexual sponge species are also known, most sponges are monoecious or bisexual. External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. what happens is the egg and male reproduction part meet outside the body of both parentsyes, plants do use external fertilization. In Sponges, fertilization is internal and development is indirect having a larval stage which is morphologically distinct from the adult.

External Fertilization. Unless specified, this website is not in any way affiliated with any of the institutions featured. •Gemmules are the asexual reproductive bodies that are formed by endogenous budding in all freshwater and some marine sponges. After the sperm reaches the egg, fertilization takes place. Internal fertilization is found in all 400+ LIKES. Features of External Fertilization. Early development takes place within maternal sponge body leading to the formation of a larval stage. Some sponges reproduce sexually.

200+ SHARES ... echinoderms sponges, flatworm, protochordates fishes, amphibians, coelenterates Answer : A Related Video.