Sexual Reproduction In Plants (continued)
Gbogbo ọrọ náà
Pollination only delivers the pollen to the doorstep. The real union of male and female happens next, hidden inside the ovary, when a pollen nucleus fuses with a nucleus in an ovule. From that single fusion a whole new plant can grow, but only if the seed later meets the right conditions to wake up.
In this lesson you will pin down fertilisation in plants, follow the pollen tube on its journey down the style to the ovule, list the adaptations that make insect- and wind-pollinated flowers good at their jobs, and investigate exactly what a seed needs to germinate: water, oxygen and a suitable temperature.
Ebumnobi
- State that fertilisation occurs when a pollen nucleus fuses with a nucleus in an ovule
- Describe the structural adaptations of insect-pollinated and wind-pollinated flowers
- Investigate and describe the environmental conditions that affect germination of seeds, limited to the requirement for: water, oxygen and a suitable temperature
- [Supplement] Describe the growth of the pollen tube and its entry into the ovule followed by fertilisation (details of production of endosperm and development are not required)
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Sexual Reproduction In Plants (continued). 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.
- Fertilisation in a flowering plant occurs when: A. pollen lands on the stigma B. a pollen nucleus fuses with a nucleus in an ovule C. the pollen tube reaches the style D. a seed germinates Answer: B
- Through which structure does the pollen tube grow to reach the ovary? A. filament B. style C. sepal D. anther Answer: B
- Which three conditions are required for the germination of seeds? A. light, water and warmth B. water, oxygen and a suitable temperature C. carbon dioxide, water and light D. nitrogen, oxygen and warmth Answer: B
- Why is oxygen needed for germination? A. for photosynthesis B. for aerobic respiration to release energy C. to attract insects D. to denature enzymes Answer: B
- In a germination experiment, the variable that is changed in one tube while all others are kept the same is the: A. control variable B. independent variable C. dependent result D. constant Answer: B
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Pollination and Fertilization
Describe what must occur for plant fertilization
"Biology: Pollination and Fertilization" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/32-2-pollination-and-fertilization. Access for free at https://openstax.org/books/biology/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Sexual Reproduction In Plants (continued)? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
