Sexual Reproduction In Plants Continued
Akopọ
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.
Awọn Afojusun
- 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)
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Sexual Reproduction In Plants Continued. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Sexual Reproduction In Plants Continued? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
Ṣe igbasilẹ ohun elo naa lori Google Playstore
Gbogbo ohun ti o nilo lati ṣe dara julọ ninu JAMB, WAEC ati NECO.
