Animalscaretips
Mollusks are primarily of separate sexes, and the reproductive organs (gonads) are simple. ... Most reproduction, however, is by sexual means. Eggs and sperm are released into the water by members of some (primitive) species, and fertilization occurs there.
- How do Mollusca reproduce asexually?
- Do mollusks reproduce asexually or sexually?
- Do molluscs lay eggs or give birth?
- Which type of reproduction is found in Mollusca?
- Which of the following is true about reproduction in Mollusca?
- Are molluscs hermaphrodites or have separate sexes?
- What is the larval stage of the mollusk called?
- Which is the larva of Mollusca?
- How many eggs do mollusks lay?
- Which female mollusc dies immediately after reproduction?
- Why do some mollusk have shells?
- Are Mollusca hermaphroditic?
- Is fertilization in molluscs external or internal?
- Is Mollusca Oviparous or viviparous?
- What is the true about Mollusca?
- What does a mollusk have?
How do Mollusca reproduce asexually?
Mollusk reproduce asexually by being hermaphroditic where they are both male and female they also asexually reproduce by budding.
Do mollusks reproduce asexually or sexually?
Mollusks reproduce sexually, and most species have separate sexes. Sexual reproduction is achieved by the formation and fusion of gametes: sperm and eggs.
Do molluscs lay eggs or give birth?
HOW DO MOLLUSKS REPRODUCE? Mollusks reproduce sexually. Slugs and snails are hermaphrodites (possessing both male and female organs), but they must still mate to fertilize their eggs. Most aquatic mollusks lay eggs that hatch into small, free-swimming larvae called veliger.
Which type of reproduction is found in Mollusca?
Mollusks are primarily of separate sexes, and the reproductive organs (gonads) are simple. Reproduction via an unfertilized gamete (parthenogenesis) is also found among gastropods of the subclass Prosobranchia. Most reproduction, however, is by sexual means.
Which of the following is true about reproduction in Mollusca?
The simplest species of molluscan reproductive system relies on external fertilization. ... Some species of mollusc are hermaphrodites that reproduce by internal fertilization. Therefore, option C both sexual and asexual reproduction is the correct answer.
Are molluscs hermaphrodites or have separate sexes?
In many marine gastropods there are separate sexes (male and female); most terrestrial gastropods however are hermaphrodites. ... Gastropods are defined as snails and slugs, belonging to a larger group called Molluscs. Gastropods have unique reproductive systems, varying significantly from one taxonomic group to another.
What is the larval stage of the mollusk called?
Both mollusks and annelids develop through a larval stage called a trochophore larva. Trochophore larvae are characterized by having a band of cilia that wraps around the body.
Which is the larva of Mollusca?
veliger, larva typical of certain mollusks such as marine snails and bivalves and a few freshwater bivalves. The veliger develops from the trochophore (q.v.) larva and has large, ciliated lobes (velum).
How many eggs do mollusks lay?
The number of eggs laid by an individual varied from 2 to 25, but may have been as high as 40.
Which female mollusc dies immediately after reproduction?
The female octopus will lay 50 to 100 eggs and carries them around in the area between her tentacles. While guarding her eggs, she doesn't eat and will die shortly after they hatch.
Why do some mollusk have shells?
Mollusks often have a hard outer shell to protect their bodies. All mollusks have a thin layer of tissue called a mantle which covers their internal organs. The mantle produces the mollusk's shell.
Are Mollusca hermaphroditic?
The study reveals that about 40% of the 5600 mollusc genera are either simultaneous or sequential hermaphrodites. ... Sequential hermaphroditism, whatever its theoretical advantages over gonochorism, is not common among molluscs. Simultaneous hermaphroditism is common among the Euthyneura.
Is fertilization in molluscs external or internal?
Introduction to Mollusca and the Class Gastropoda
A generic mollusc is dioecious with paired gonads. Eggs or sperm are released into the coelomic cavity and carried outside by ducts. Fertilization is external and the zygote develops into a gastrula and then a free-swimming trochophore larva.
Is Mollusca Oviparous or viviparous?
Birds, reptiles, amphibians, most fish, insects, mollusks, arachnids, and monotremes are oviparous animals. Most mammals are viviparous animals.
What is the true about Mollusca?
Bilateral symmetry and calcareous shell.
What does a mollusk have?
Mollusks have a hard outer shell. There is a layer of tissue called the mantle between the shell and the body. Most mollusks have tentacles for feeding and sensing, and many have a muscular foot. Mollusks also have a coelom, a complete digestive system, and specialized organs for excretion.
