Which of these organisms partly digest its food extracellularly?

Analyze the question: It asks which organism partly digests its food outside its body (extracellularly, outside the cells and often outside the gut). It is a feeding-method question.

Concept:

• Extracellular digestion happens outside cells, for example in the gut cavity or even outside the body.
• Spiders cannot swallow solid food. They inject or pour digestive enzymes into the prey, which breaks down the tissues into a liquid "soup" outside the spider's body. The spider then sucks up this partly digested fluid. This is external, extracellular digestion.

Check each option:

• A. Butterfly: It feeds on nectar through a proboscis. Nectar is already liquid sugar, so no external digestion is needed.
• B. Cockroach: It chews solid food and digests it inside its alimentary canal (crop, midgut), with saliva beginning digestion in the mouth. This is internal digestion, not outside the body.
• C. Spider: It injects enzymes into prey and digests it partly outside the body before ingestion. ✔
• D. Mosquito: It sucks blood or plant juices. Digestion happens inside the gut, not externally.

Tip: Remember "Spider = soup." If an animal liquefies its prey before swallowing it, think external (extracellular) digestion. Housefly (which vomits enzymes onto food) is another example that JAMB likes to ask about.