True jellies Annelida Nematoda Platyhelmlnthes Flame bulbs Multiple Choice. Choo

Question

True jellies Annelida Nematoda Platyhelmlnthes Flame bulbs Multiple Choice. Choose the best answer. Which statement about primitive sponges is false? Sponge don't have skeletons, but they do have spicules and spongin to support the cells. Sponges are said to be organized at a cellular level, but they do have a loosely organized ectoderm layer. Choanocytes are flagellated sponge cells that create the water current and filter food particles. Water flows in the osculum. The coelom is____. missing from the Platyhelminthes. located between the mesoderm and endoderm layer. present in the Nematoda. contains internal organs in the earthworm and other Annelida. Two of the answers are correct.

Explanation / Answer

7) Scyphozoa are an exclusively marine class of the phylum Cnidaria. Scyphozoans are referred to as the true jellyfishes or true jellies.

Hence, the correct option is (B).

8) The phylum platyhelminthes literally means flatworms. Flame bulb or flamecell is a specilaised excretory cell found in flatworms.

Hence , the correct option is (C).

9) Osculum is a small opening in the sponge through which it expels the filtered water. Therefore, this statement about primitive sponges is false.

Hence, the correct option is (D).

10) The coelom is a fluid filled space present between the bodywall and the digestive tract. The animals with no bodycavity are termed as acoelomates. Therefore, the coelom is missing in platyhemlinthes which are acoelomates. The gut and internal organs of the coelomates like earthworms and other annelids are suspended in the coelom. Therefore, two answers A and D are correct.

Hence, the correct option is (E).

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.