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One species of white worm relies exclusively on fragmentation to reproduce. It spontaneously fragments into five to 10 pieces, each of which grows a new head and tail. Sometimes, a fragment will grow heads at both ends, resulting in what scientists call a bipolar worm.Earthworms are monoecious or hermaphrodites, i.e. they contain both male and female reproductive organs. Reproduction is mostly by cross-fertilization in earthworms. Reproductive organs are present on 9th to 15th segments.The species of earthworms that reproduce asexually uses unfertilized eggs. Sometimes this process of the earthworms is mistaken for the process in which a worm can regenerate new cells when cut in half.
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How do earthworms reproduce?
Earthworms are monoecious or hermaphrodites, i.e. they contain both male and female reproductive organs. Reproduction is mostly by cross-fertilization in earthworms. Reproductive organs are present on 9th to 15th segments.
How do earthworms reproduce asexually?
The species of earthworms that reproduce asexually uses unfertilized eggs. Sometimes this process of the earthworms is mistaken for the process in which a worm can regenerate new cells when cut in half.
EARTHWORM REPRODUCTION
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Which type of reproduction takes place in earthworm?
Earthworms are hermaphrodite organisms, meaning that each earthworm has both male and female sexual reproduction organs. 5. Sexual reproduction involves two earthworms. The two earthworms produce a slime tube and grip onto each other using the tubercula pubertatis (located on the saddle).
How are earthworms cocoons formed?
Cocoon is secreted as a viscid and gelatinous substance by clitellar glands, forming broad membranous band or girdle around clitellum. It hardens gradually on exposure to air into a tough but elastic tube which becomes the cocoon or egg capsules.
How often do earthworms reproduce?
Worms are ready to breed once they mature from 50 to 90 days. Earthworms are hermaphrodites; they can be male or female (a great advantage!). They can perform both male and female functions and mate every 7 to 10 days.
Do worms feel pain?
But a team of Swedish researchers has uncovered evidence that worms do indeed feel pain, and that worms have developed a chemical system similar to that of human beings to protect themselves from it.
How do earthworms grow?
After earthworms mate, their fertilised eggs are held in a protective cocoon. The baby worms (hatchlings) emerge and burrow into the soil, where they grow into juvenile then mature worms.
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What type of asexual reproduction is worm?
Many species of annelids (worms) reproduce via an asexual process called fragmentation.
Are earthworms self-fertilization?
The earthworms are hermaphrodites. They can produce egg and sperms in the same body. They cannot reproduce by self-fertilization. The reason is that the male and the female sex organs do not mature at the same time.
What is the fertilization of earthworms?
Earthworms are generally considered to be cross-fertilization hermaphrodites (i.e., using reciprocal insemination, transferring, and receiving sperm in the same copu- lation).
What is earthworm cocoon?
Clitellate annelids (e.g., earthworms, leeches) secrete egg sacs, or cocoons, from specialized midbody segments known as the clitellum. This process is characterized by formation of a cocoon sheath/wall that initially surrounds the clitellum and into which nutritive cocoon fluid and eggs are deposited.
How many cocoons do earthworms lay?
Some earthworm species can produce up to 80 cocoons in weeks, although this can take months, or even up to a year. Earthworms can grow and live for up to eight years, but the majority are eaten or killed before they reach that age. An earthworm’s average life span is less than a year.
What is Ootheca in earthworm?
Answer: An ootheca is an mass of egg and it’s produced by several different groups of insects. Explanation: Most notably Praying mantids and cockroaches.
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Do worms multiply when cut in half?
If an earthworm is split in two, it will not become two new worms. The head of the worm may survive and regenerate its tail if the animal is cut behind the clitellum, according to The Washington Post.
What happens when you cut a worm in half?
One half — the one with the brain — will typically grow into a full worm. Scientists have now identified the master control gene responsible for that regrowth in one particularly hardy type of worm.
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