Reproduction In Plants
Muhtasari
Every maize cob and every pod of beans began as a flower. Plants make the next generation in two very different ways. In sexual reproduction a flower brings male and female cells together to make seeds, mixing the qualities of two parents. In asexual reproduction a single plant grows a whole new plant from a piece of itself, a tuber or a cutting, with no seeds and no mixing at all. A farmer uses both: seeds to grow a maize field, cuttings to multiply a prized cassava.
In this lesson you will compare the wind-pollinated flower of maize with the insect-pollinated flower of a bean, follow pollen to the egg in fertilisation, and see how seeds and fruits are spread so that new plants are not crowded together. You will also learn why scattered weed seeds are so hard to control, and how planting tubers and cuttings lets a farmer copy a good plant exactly.
Malengo
- (a) define the term sexual reproduction.
- (b) describe the structure and functions of the flowers of a maize plant and of a bean plant.
- (c) define the term pollination.
- (d) describe the process of fertilisation in a named plant.
- (e) describe how seeds and fruits are dispersed and explain the importance of dispersal in relation to weed control.
- (f) describe asexual reproduction from stem tubers (e.g. Irish potato and yam) and from stem cuttings (e.g. sweet potato, cassava and sugar cane).
Maelezo ya Somo
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Reproduction In Plants. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Pollination is best described as the transfer of pollen from: A. One ovule to another B. An anther to a stigma C. The style to the ovary D. A seed to the soil Answer: B
- Which feature shows that a flower is wind-pollinated? A. Bright, scented petals B. A reward of nectar C. Large, feathery stigmas that hang outside D. Sticky pollen Answer: C
- Fertilisation in a flowering plant is the fusion of the: A. Anther and the filament B. Male nucleus and the female nucleus C. Stigma and the style D. Pollen and the petal Answer: B
- Which crop is normally grown from stem cuttings? A. Maize B. Bean C. Cassava D. Carrot Answer: C
- An advantage of growing a crop from tubers or cuttings is that the new plants are: A. More varied than the parent B. Identical to the parent C. Always disease-free D. Produced from seed Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Reproduction In Plants? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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