Reproduction
Akopọ
From the pollen drifting off a grass flower to the development of a human baby, reproduction is the process that keeps every species alive. It comes in two fundamentally different forms, and the choice between them shapes everything from genetic diversity to the speed at which a population can grow.
In this lesson you will compare sexual and asexual reproduction, trace the journey from pollination to seed formation in plants, explore how the human reproductive systems work, and see how hormones control the menstrual cycle. You will also learn how the placenta and amniotic fluid protect the developing embryo.
Awọn Afojusun
- Understand the differences between sexual and asexual reproduction
- Understand that fertilisation involves the fusion of a male and female gamete to produce a zygote that undergoes cell division and develops into an embryo
- Describe the structures of an insect-pollinated and a wind-pollinated flower and explain how each is adapted for pollination
- Understand that the growth of the pollen tube followed by fertilisation leads to seed and fruit formation
- Investigate the conditions needed for seed germination
- Understand how germinating seeds utilise food reserves until the seedling can carry out photosynthesis
- Understand that plants can reproduce asexually by natural methods and by artificial methods
- Understand how the structure of the male and female reproductive systems are adapted for their functions
- Understand the roles of oestrogen and progesterone in the menstrual cycle
- Describe the role of the placenta in the nutrition of the developing embryo
- Understand how the developing embryo is protected by amniotic fluid
- Understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics
Àwòrán ọpọlọ
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Ṣí àwòrán ọpọlọ nínú áàpù
Káàdì ìrántí
Ìdánrawò kíákíá lórí ohun tí wọ́n ń dán wò nínú kókó yìí.
Ṣe ìdánrawò káàdì wọ̀nyí nínú áàpù
Akọ̀wé Ẹ̀kọ́
Àkọsílẹ̀ Ẹ̀kọ́ Pípé wà lórí Ohun Èlò Green Bridge
Gba ohun èlò Green Bridge CBT sórí fóònù tàbí kọ̀mpútà rẹ fún gbogbo ilé ìkàwé IGCSE: ìwé ìdánwò àtijọ́, ìlànà ìdíwọ̀n, àwòrán èrò, káàdì ìkẹ́kọ̀ọ́ àti ẹ̀kọ́ ohùn.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Reproduction. 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.
- Which of the following is a feature of asexual reproduction? A) Two parents are required B) Gametes fuse at fertilisation C) Offspring are genetically identical to the parent D) Meiosis produces the sex cells Answer: C
- In a wind-pollinated flower, the stigma is typically: A) Small and sticky, inside the flower B) Large and feathery, hanging outside the flower C) Brightly coloured to attract insects D) Covered in nectar Answer: B
- Which three conditions are needed for seed germination? A) Light, water and warmth B) Water, oxygen and warmth C) Light, oxygen and carbon dioxide D) Water, carbon dioxide and warmth Answer: B
- What is the function of the placenta during pregnancy? A) To produce amniotic fluid B) To allow exchange of substances between maternal and embryonic blood C) To store the embryo's food reserves D) To produce sperm and egg cells Answer: B
- Which hormone is responsible for maintaining the uterus lining after ovulation? A) Testosterone B) Oestrogen C) Progesterone D) Adrenaline Answer: C
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
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
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Abala ìwé ẹ̀kọ́
Reproduction Methods
Describe advantages and disadvantages of asexual and sexual reproduction
"Biology: Reproduction Methods" 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/43-1-reproduction-methods. Access for free at https://openstax.org/books/biology/pages/1-introduction
Àwọn àjọ mìíràn ló tẹ̀ wọ́n jáde lábẹ́ ìwé àṣẹ ṣíṣí, a sì dá wọn lọ́lá bí wọ́n ṣe béèrè. Àwọn ìjápọ̀ ń ṣí ojú òpó wọn.
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Reproduction? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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