Import Question JSON

Current Question (ID: 13450)

Question:

All the following are present in sponges, except

Options:

1. Spicules
2. Choanocytes
3. A digestive tract
4. Sexual and / or asexual reproduction

Solution:

Sponges (phylum Porifera) are simple multicellular animals that lack specialized tissues and organs. They are characterized by their unique feeding mechanism performed by choanocytes or collar cells, which capture food particles with their flagella. Spicules, which are needle-like structures made of calcium carbonate or silica, provide structural support to the sponge body. Sponges are capable of both sexual and asexual reproduction through various mechanisms such as budding, gemmules, and fragmentation. However, sponges do not possess a true digestive tract or a gut like other animals. They lack a mouth or anus and rely on intracellular digestion, where food particles are engulfed by choanocytes and digested within their cells. Therefore, option 3 is incorrect as sponges do not have a digestive tract.

Import JSON File

Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}