Sciences - Co-ordinated (9-1) - 0973 CIE

Conservation

Gbogbo ọrọ náà

Once a species is gone, it is gone forever, and its genes go with it. Conservation is the active effort to stop that happening: to manage forests and fish so they renew themselves, to protect species in danger, and to keep ecosystems working. It is part science, part global cooperation, and increasingly urgent.

In this lesson you will define a sustainable resource, explain why species become endangered or extinct, and describe how we conserve them, from protected areas and captive breeding to seed banks. You will also meet the [Supplement] tools of modern conservation, including fishing quotas, AI and IVF, and the genetic danger that small populations face.

Ebumnobi

Describe a sustainable resource as one which is produced as rapidly as it is removed from the environment so that it does not run out
State that some resources can be conserved and managed sustainably, limited to forests and fish stocks
Explain why organisms become endangered or extinct, including: climate change, habitat destruction, hunting, overharvesting, pollution and introduced species
Describe how endangered species can be conserved, limited to: (a) monitoring and protecting species and habitats (b) education (c) captive breeding programmes (d) seed banks
[Supplement] Explain how forests can be conserved using: education, protected areas, quotas and replanting
[Supplement] Explain how fish stocks can be conserved using: education, closed seasons, protected areas, controlled net types and mesh size, quotas and monitoring
[Supplement] Describe the reasons for conservation programmes, limited to: (a) maintaining or increasing biodiversity (b) reducing extinction (c) protecting vulnerable ecosystems (d) maintaining ecosystem functions, limited to nutrient cycling and resource provision, including food, drugs, fuel and genes
[Supplement] Describe the use of artificial insemination (AI) and in vitro fertilisation (IVF) in captive breeding programmes
[Supplement] Explain the risks to a species if its population size decreases, reducing genetic variation (knowledge of genetic drift is not required)

Akọmọ Ojú-ẹkọ

Biodiversity is a resource we cannot remake. It gives us food, medicines, fuel and the genes to breed better crops, and it keeps ecosystems, including nutrient cycles, functioning. Conservation questions ask you to explain causes of extinction, evaluate methods, and (for [Supplement]) justify why we bother. The reasoning is exactly what the exam rewards.

Ọ dị na ngwa Green Bridge

Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.

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Ọ dị na Android, Windows, macOS, na Linux

Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Conservation. 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.

A sustainable resource is one that is: A. very cheap to produce B. produced as rapidly as it is removed, so it does not run out C. never used by humans D. only found in forests Answer: B
Which is NOT a cause of species becoming endangered? A. habitat destruction B. captive breeding C. hunting D. pollution Answer: B
Seed banks help conservation by: A. killing pests B. storing seeds as a gene bank against extinction C. increasing pollution D. clearing forests Answer: B
A closed season conserves fish stocks by: A. allowing fish to spawn and mature before being caught B. using smaller nets C. removing all predators D. adding fertiliser Answer: A
A small population is at greater risk of extinction because it has: A. too many predators B. reduced genetic variation C. too much food D. more habitats Answer: B