Biology (9-1) - 0970 CIE

Translocation

Gbogbo ọrọ náà

A leaf makes far more sugar than it can use, while a growing root or a swelling potato makes none at all. Getting food from where it is made to where it is needed is the job of translocation, the movement of sugar and amino acids through the phloem.

This is an Extended-tier topic. In this lesson you will learn exactly what translocation is, what 'sources' and 'sinks' mean, and why the very same part of a plant can switch from being a source to a sink at different times in its life.

Ebumnobi

[Supplement] Describe translocation as the movement of sucrose and amino acids in phloem from sources to sinks
[Supplement] Describe: (a) sources as the parts of plants that release sucrose or amino acids (b) sinks as the parts of plants that use or store sucrose or amino acids
[Supplement] Explain why some parts of a plant may act as a source and a sink at different times

Akọmọ Ojú-ẹkọ

Translocation completes the plant transport story alongside xylem and transpiration. It explains how a seed gets the food to germinate, how a potato stores starch, and how a fruit fills with sugar. Examiners test it with source-and-sink scenarios, so understanding the idea, not just the words, is what scores.

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Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Translocation. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

Translocation is the movement of sucrose and amino acids in the: A. xylem B. phloem C. epidermis D. cortex Answer: B
A source in a plant is a part that: A. uses or stores sugar B. releases sucrose or amino acids C. only absorbs water D. carries out respiration only Answer: B
Which of these usually acts as a sink? A. a green leaf in bright light B. a growing root C. a fully photosynthesising leaf D. the air spaces Answer: B
Compared with water in the xylem, substances in the phloem can move: A. upwards only B. downwards only C. up or down D. not at all Answer: C
A sprouting potato tuber sending sugar to its buds is acting as a: A. sink B. source C. root hair D. stoma Answer: B