You are watching: How are the life cycles of mollusks and insects alike?
Most mollusks require sexual reproduction however some, such together many types of snails, room hermaphrodites, definition both the male and female genders are consisted of within one separation, personal, instance animal and also self-fertilization takes place. The mollusk life bike is relatively complex for such a an easy creature and it different greatly amongst different classifications of mollusks and also among species within classifications. This renders it impossible to discuss the life bicycle of the phylum together a whole. However, within different classifications, the life cycle might follow somewhat comparable patterns amongst various species.
The life cycle of the squid varies among species, however, that of many squid adheres to a similar pattern. Female ink spawn, leave fertilized eggs in the water. Depending upon environmental conditions, the egg hatch within about two weeks. Larvae, referred to as rhynchoteuthion, emerge. Throughout development, the larvae develops two tentacles and the eight arms grow in length. Together an adult, the male squid will certainly fertilize the females eggs and the spawning procedure will begin again.
The life cycle of the octopus additionally varies amongst species, but generally complies with a similar pattern. The male octopus places his tentacle within the female"s cavity and also inserts a sperm packet. He then dies. The woman octopus will certainly lay 50 to 100 eggs and also carries them approximately in the area between her tentacles. If guarding she eggs, she doesn"t eat and will die shortly after they hatch. A small octopus emerges from each egg and grows come an adult when it as well will mate and begin the life bicycle again.
Again, with the clam, the life bike differs among individual species, however follows a fairly similar pattern. The mussel life bike is also similar to the of the clam. A fertilized egg develops within the clam"s shell. Once the eggs hatch, larvae emerge from the adult and fall come the bottom the the water come wait because that an opportunity to connect to a host, most regularly a fish. The organization of the host creates a cyst end the larva. As soon as mature, the clam division out of the cyst and returns come the water bottom come its life together an adult.
Reproduction among oysters starts when water temperatures warm to 68 levels or greater. Oysters spawn with the woman releasing eggs right into the water and also the masculine releasing sperm. Within about six hours, a fertilized egg develops into a free-swimming larva the will construct a shell within 12 to 24 hours. In ~ a few weeks, the shelled larva develops a foot and also settles to the bottom the the water, attaching itself to a tough surface--usually the shell of an adult oyster--to enter into metamorphoses. An adult oyster emerges soon thereafter.
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The snail life cycle varies between species, v some requiring sexual reproduction and others reproducing v self-fertilization. In those where sexual reproduction is necessary, two adult snails--both of who usually have both male and female reproductive organs--will mate and both will develop fertilized eggs. The eggs are deposited right into the soil and will stay there for about four weeks before hatching. The larvae have actually a covering at birth, however must conveniently consume calcium to make the shell thrive hard. The snail will proceed to mature and in most species doesn"t reach sexual maturity because that a pair of years.
Bethney Foster is society justice coordinator for Mercy Junction ministry, wherein she edits the monthly publishing "Holy Heretic." She is likewise an fostering coordinator through a pet rescue agency. Foster spent nearly two years as a newspaper reporter/editor. She i graduated from Campbellsville University, receiving a Bachelor of art in English, journalism and also political science.