In a sugar cane plantation in St. Kitts, aphids insert their piercing mouthparts into plant stems to feed. Which tissue do aphids specifically target to obtain their food?

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Question

In a sugar cane plantation in St. Kitts, aphids insert their piercing mouthparts into plant stems to feed. Which tissue do aphids specifically target to obtain their food?

Accepted Answer

Phloem sieve tubes — Award 1 mark for “Phloem sieve tubes”. Aphids feed on sugars transported in phloem sieve tubes, which contain high concentrations of sucrose and amino acids. “Xylem vessels” is incorrect — xylem transports water and minerals, not the sugary solution aphids require. “Cambium tissue” is incorrect — cambium is meristematic tissue for growth. “Cortex parenchyma” is incorrect — cortex stores materials but does not transport high concentrations of sugars.

Answer

Cortex parenchyma

Answer

Phloem sieve tubes

Answer

Cambium tissue

Answer

Xylem vessels

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