Biology IGCSE: Human Influences on Ecosystems

This is a Biology IGCSE covering Topic 20 Human Influences on Ecosystems - Cambridge Assessment - Codes (0610) and (0970)

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Biology Cambridge IGCSE Course – Code 0610 and 0970: Topic 20 -Human Influences on Ecosystems

Course Description:

Welcome to our Biology Cambridge IGCSE course, meticulously tailored to help you conquer the intricacies of Topic 20: Human Influences on Ecosystems.  This comprehensive course is specifically designed for both Code 0610 and Code 0970 syllabi, ensuring you’re well-prepared for the IGCSE Biology examination.

Course Highlights:

  • Comprehensive Core and Supplement Objectives: Master all core and supplement objectives as outlined in the syllabus for theory (papers 1, 2, 3, 4). These objectives provide a solid foundation for exam success.
  • Note: There are no practical experiments associated with this topic.

Course Outline & Objectives (Core and Supplement):

  1. Food Supply (Lesson 1): Key objectives include:
  • Describe how humans have increased food production, limited to (a) agricultural machinery to use larger areas of land and improve efficiency (b) chemical fertilizers to improve yields (c) insecticides to improve quality and yield (d) herbicides to reduce competition with weeds (e) selective breeding to improve production by crop plants and livestock.
  • Describe the advantages and disadvantages of large-scale monocultures of crop plants.
  • Describe the advantages and disadvantages of intensive livestock production.
  1. Habitat Destruction (Lesson 2): Key objectives include:
  • Describe biodiversity as the number of different species that live in an area.
  • Describe the reasons for habitat destruction, including (a) increased area for housing, crop plant production, and livestock production (b) extraction of natural resources (c) freshwater and marine pollution.
  • State that through altering food webs and food chains, humans can have a negative impact on habitats.
  • Explain the undesirable effects of deforestation as an example of habitat destruction, to include reducing biodiversity, extinction, loss of soil, flooding, and increase of carbon dioxide in the atmosphere.
  1. Pollution (Lesson 3): Key objectives include:
  • Describe the effects of untreated sewage and excess fertilizer on aquatic ecosystems.
  • Describe the effects of non-biodegradable plastics, in both aquatic and terrestrial ecosystems.
  • Describe the sources and effects of pollution of the air by methane and carbon dioxide, limited to the enhanced greenhouse effect and climate change.
  • Explain the process of eutrophication of water, limited to increased availability of nitrate and other ions, increased growth of producers, increased decomposition after death of producers, increased aerobic respiration by decomposers, reduction in dissolved oxygen, and death of organisms requiring dissolved oxygen in water.
  1. Conservation (Lesson 4): Key objectives include:
  • Describe a sustainable resource as one that 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 programs (d) seed banks.
  • Explain how forests can be conserved using: education, protected areas, quotas, and replanting.
  • Explain how fish stocks can be conserved using: education, closed seasons, protected areas, controlled net types and mesh size, quotas, and monitoring.
  • Describe the reasons for conservation programs, 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.
  • Describe the use of artificial insemination (AI) and in vitro fertilization (IVF) in captive breeding programs.
  • Explain the risks to a species if its population size decreases, reducing genetic variation (knowledge of genetic drift is not required)

Course Benefits:

  • Engage with meticulously crafted video lessons, providing comprehensive explanations of each lesson and experiment.
  • Access downloadable summary study sheets that condense essential information, aiding your pursuit of an A* grade.
  • Enhance your preparation with quizzes and assignments based on past papers to boost your confidence for the exam.
  • Become part of a dynamic student group community, where you can interact with fellow learners and the course instructor, asking questions and sharing updates.

Unlock the captivating world of biology and prepare to excel in the IGCSE Biology examination through our “Biology Cambridge IGCSE Course – Code 0610 and 0970: “Human Influences on Ecosystems” course.

You will need:

  • Computer or Mobile
  • Internet
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Lawra Hasayen Instructor
I'm the founder of Lawra Academy, with over two decades of teaching experience in Biology. I've had the privilege of instructing high school students preparing for exams such as IGCSE, A-levels, SAT, AP, IB, and SABIS, as well as offering tutoring to university students in various Business Administration subjects. During my extensive career, I spent more than 13 successful years at King Saud International School. My students consistently achieved outstanding results, often earning A* grades. Additionally, I served as the head of the biology department. Eventually, I decided to embark on my entrepreneurial journey, leading to the establishment of Lawra Academy.