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How many characters in the list given be...

How many characters in the list given below are true regarding aschelminthes.
(I) Circular in cross section, hence the name flatworrns.
(II) Pseudocoelomate aniamls
(III) Alimentary canal is complete with muscular pharynx.
(IV) Sexes are separate (Dioecious)
(v) Fertilisation is extrernal
(VI) Development is indirect only

A

Two

B

Three

C

Four

D

Five

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many characters in the list are true regarding Aschelminthes, we will evaluate each statement one by one. 1. **Statement I: Circular in cross section, hence the name flatworms.** - This statement is incorrect. Aschelminthes are not flatworms; they are roundworms (Nematoda), which are circular in cross-section. Flatworms belong to the phylum Platyhelminthes. 2. **Statement II: Pseudocoelomate animals.** - This statement is correct. Aschelminthes (or Nematodes) are indeed pseudocoelomate, meaning they have a body cavity that is not completely lined by mesoderm. 3. **Statement III: Alimentary canal is complete with muscular pharynx.** - This statement is correct. Aschelminthes have a complete alimentary canal, which includes a mouth and an anus, and they possess a muscular pharynx. 4. **Statement IV: Sexes are separate (Dioecious).** - This statement is correct. Aschelminthes are dioecious, meaning that individual organisms are either male or female. 5. **Statement V: Fertilization is external.** - This statement is incorrect. In Aschelminthes, fertilization is typically internal, occurring within the female body. 6. **Statement VI: Development is indirect only.** - This statement is incorrect. Aschelminthes can have both direct and indirect development, depending on the species. Now, let's summarize the results: - Correct statements: II, III, IV - Incorrect statements: I, V, VI Thus, the total number of correct statements regarding Aschelminthes is **3**. ### Final Answer: **3 statements are correct.**
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