Biology SL
Biology SL
4
Chapters
553
Notes
Theme A - Unity & Diversity
Theme A - Unity & Diversity
Origin Of Life: The Crucial Role Of Water!
Unlocking Water’s Secrets: Hydrogen Bonds Explained!
Unlocking Water’s Cohesive Secrets!
Unlocking Water Adhesion Impacts on Organisms!
Unlock Water's Solvent Secrets!
Explore Water's Unique Properties & Their Impact on Aquatic Life
Unlocking Earth’s Water: An Extraplanetary Mystery
Unlocking Extraterrestrial Life: The Water Connection!
Unlocking the Secrets of DNA: The Blueprint of Life!
Unlock the Secrets of Nucleotides!
Unlocking DNA: Sugar-Phosphate Bonding Secrets
Unlock the Genetic Code Base Sequences in DNA & RNA!
Unlocking RNA: The Marvel of Nucleotide Polymers!
Unlocking DNA Dive Into The Double Helix!
Unveil DNA & RNA's Unique Characteristics!
Unlocking DNA The Power Of Base Pairing
Unlock the Secrets of DNA's Infinite Storage!
Unlocking the Universal Genetic Code's Secrets
Explore RNA & DNA Directionality!
Unlock DNA's Secrets: Purine-Pyrimidine Bonding
Unlock Nucleosome Secrets: Visualize DNA Structure!
Unlocking Genetics: Hershey-Chase Experiment Insights
Unlocking DNA Chargaff’s Revolutionary Data Insights
Explore Earth & Titan's Ancient Secrets!
Unlocking Life Cells, The Smallest Self-Sustaining Units
Unlocking the Secrets Origin of Cells Mystery
Unlocking Life’s Origins: The Carbon Compound Mystery!
Discover the Formation of Vesicles Essential Cellular Components!
Discover RNA Evolution's First Catalyst
Unlocking Life's Origins Deciphering LUCA's Code
Tracing Life's Origins: From Earliest Cells to Universal Ancestor
Hydrothermal Vents Tracing Back to LUCA's Evolutionary Origins
Cell Theory: The Fascinating Foundation of All Life
Mastering Microscopy Enhance Your Viewing Experience
Evolution of Microscopy From Light to Electron Advancements
Key Cellular Structures Shared By All Organisms
Prokaryotes vs. Eukaryotes: Discovering Cell Structures
Eukaryotic Cell Structure: Key Differences & Features
Explore Unicellular Life's Mysteries!
Explore Eukaryotic Cell Structures!
Unusual Cell Structures in Eukaryotes
Explore Cell Structures & Types in Micrographs!
Unlock Cell Structure: Electron Micrograph Drawings!
Unlocking the Secrets: Origins of Eukaryotic Cells
Unlock Cell Differentiation Secrets!
Explore Multicellular Evolution A Deep Dive
Unveiling Viral Secrets Structural Insights Revealed!
Exploring Virus Structures: A Diverse Universe
Unlock The Mysteries Of Virulent Bacteriophage Lambda
Unlocking Virus Secrets The Lysogenic Cycle!
Unlocking Viral Origins Evidence & Hypotheses
Unlocking Virus Evolution Mysteries!
Exploring Life's Diversity: Varieties in Organisms
Unraveling the Essence of Species and Their Traits
Unlock Binomial Naming in Biology!
Understanding The Biological Species Concept
Unraveling Species & Populations Divergence And Speciation
Unveiling Chromosome Diversity From Plants To Animals
Unlocking The Mystery Of Chromosome Evolution
Unity & Diversity Delving Into Species' Genomes
Unraveling Eukaryote Genome Diversity Size Vs. Functionality
Unraveling Genome Sizes Complexity, Evolution, & Research Insights
Evolution & Future of Whole Genome Sequencing
Challenges With Biological Species Concept Asexual Species & Bacteria
Chromosome Count's Role In Species Fertility And Diversity
Unlocking Nature's Secrets: Craft The Perfect Dichotomous Key
Unlocking Species Secrets: DNA Barcodes in Environmental Research
Why Classification of Organisms Is Essential in Biology
Challenges In Traditional Taxonomy The Boundary Paradox Explored
Unraveling Evolution's Clues: Benefits of Taxonomic Classification
Understanding Clades Evolution's Family Trees
Unlocking Evolution The Molecular Clock & DNA Sequence Alignment
Constructing Cladograms Using DNA Sequence Analysis
Unlock Cladogram Analysis Secrets!
Explore Cladistics Unlocking Evolutionary Secrets
Explore The Three Domains of Life!
Unveiling Evolution Deciphering Nature's Timeless Secrets
Unlocking Evolution DNA & RNA Sequence Insights
Unlocking Evolution Insight From Selective Breeding
Unlocking Darwin's Secrets The Unity of Type
Unlocking Convergent Evolution Secrets
Explore Speciation Evolution's Splitting Phenomenon!
Unlocking Speciation Role of Isolation & Selection
Explore Speciation Sympatric Vs Allopatric
Unlock Biodiversity Adaptive Radiation Secrets!
Unlocking Hybridization Secrets: A Guide to Species Breeding
Explore the Genesis of New Plant Species!
Explore The Wonders of Biodiversity!
Exploring Earth's Biodiversity Past And Present
Exploring Human-Caused Species Extinction
Critical Causes Of Ecosystem Loss Unveiled!
Biodiversity Crisis Unraveling the Evidence!
Urgent Biodiversity Crisis & Human Impact
Unlock Diverse Conservation Strategies!
Preserve Unique Species The EDGE Project
Theme B - Form & Function
Theme B - Form & Function
Theme C - Interaction &  Interdependence
Theme C - Interaction & Interdependence
Theme D - Continuity & Change
Theme D - Continuity & Change
IB Resources
Theme A - Unity & Diversity
Biology SL
Biology SL

Theme A - Unity & Diversity

Urgent Biodiversity Crisis & Human Impact

Word Count Emoji
404 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Quick facts 🚀

  • We're currently in a biodiversity crisis. Humans have been causing species extinctions for thousands of years, but things got really bad after 1970.
  • By 2019, humans had changed 75% of the land and 66% of the oceans. BIG yikes!

Earth's rocky rollercoaster history 🌍

  • "Snowball Earth" - the Earth dressed up as a giant snowball with ice everywhere!
  • Hot Vacay Mode - No ice, even at the poles.
  • Musical Continents - Sometimes just one mega land; other times, lots of island continents.
  • Earth's Dramatic Moments - FIVE mass extinctions due to big bad events like space rock crashes (asteroids) and volcano tantrums.

Did You Know? The ongoing (sixth) mass extinction is speeding, but we can put the brakes on because it's caused by us!

Why is biodiversity packing its bags? 🤔

Here are the main reasons species are waving goodbye

  • Hunting & Over-Exploitation: It's like eating all the candy from the jar and not saving any for later.

    • Real-world example: Overfishing in oceans leaving certain fish populations declining rapidly.
  • Urbanization: More towns, cities, and concrete jungles!

    • Real-world example: Think of New York City expanding and a squirrel losing its favorite tree home 🐿️.
  • Deforestation & Agriculture: Trees are getting the axe for more farms.

    • Real-world example: The Amazon rainforest losing trees for soybean farms.
  • Pollution: Too much trash in the land and oceans.

    • Real-world example: Remember the viral photo of a turtle with a straw in its nose? 🐢
  • Alien Invasive Species: Not ET aliens, but plants, animals, or pathogens from one place causing chaos in another.

    • Real-world example: The Burmese python in the Florida Everglades eating everything!

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Dive deeper and gain exclusive access to premium files of Biology SL. Subscribe now and get closer to that 45 🌟

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IB Resources
Theme A - Unity & Diversity
Biology SL
Biology SL

Theme A - Unity & Diversity

Urgent Biodiversity Crisis & Human Impact

Word Count Emoji
404 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

Quick facts 🚀

  • We're currently in a biodiversity crisis. Humans have been causing species extinctions for thousands of years, but things got really bad after 1970.
  • By 2019, humans had changed 75% of the land and 66% of the oceans. BIG yikes!

Earth's rocky rollercoaster history 🌍

  • "Snowball Earth" - the Earth dressed up as a giant snowball with ice everywhere!
  • Hot Vacay Mode - No ice, even at the poles.
  • Musical Continents - Sometimes just one mega land; other times, lots of island continents.
  • Earth's Dramatic Moments - FIVE mass extinctions due to big bad events like space rock crashes (asteroids) and volcano tantrums.

Did You Know? The ongoing (sixth) mass extinction is speeding, but we can put the brakes on because it's caused by us!

Why is biodiversity packing its bags? 🤔

Here are the main reasons species are waving goodbye

  • Hunting & Over-Exploitation: It's like eating all the candy from the jar and not saving any for later.

    • Real-world example: Overfishing in oceans leaving certain fish populations declining rapidly.
  • Urbanization: More towns, cities, and concrete jungles!

    • Real-world example: Think of New York City expanding and a squirrel losing its favorite tree home 🐿️.
  • Deforestation & Agriculture: Trees are getting the axe for more farms.

    • Real-world example: The Amazon rainforest losing trees for soybean farms.
  • Pollution: Too much trash in the land and oceans.

    • Real-world example: Remember the viral photo of a turtle with a straw in its nose? 🐢
  • Alien Invasive Species: Not ET aliens, but plants, animals, or pathogens from one place causing chaos in another.

    • Real-world example: The Burmese python in the Florida Everglades eating everything!

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Biology SL. Subscribe now and get closer to that 45 🌟

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