IB_BIOLOGYSYLLABUS2025_A.3.1_ diversity of organisms
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Course
Biology and Geology
Institution
Bachillerato
Get ready to dive into a world of knowledge that bridges Earth and the stars! Whether you're a student, science enthusiast, or just curious about the universe, these notes are your key to mastering the wonders of biology and astrobiology. Here's why you can't miss out:
Comprehensive Mastery: Ex...
This guide provides a structured overview of species concepts, variation,
and the importance of water in life, both on Earth and potentially
elsewhere in the universe.
Notes on Water's Role in Life and Extraterrestrial Life
● Understanding Water's Role: Water is essential for life on Earth, supporting
everything from microscopic organisms to complex ecosystems. Its presence
is a key indicator in the search for extraterrestrial life, making it a critical area
of study in astrobiology.
● Simplified Explanations: Concepts are presented in a straightforward
manner, accompanied by visuals and real-world examples to aid
understanding. These explanations are perfect for students and enthusiasts at
all levels of learning.
● Exam Preparation: The notes are comprehensive yet concise, making them
ideal for exam revision and reinforcing fundamental concepts.
Species and Classification
Variation as a Defining Characteristic of Life
● Variation: All living organisms exhibit variation, which is a key feature of life.
No two individuals are identical in all their traits.
● Importance of Classification: Due to this variation, classification systems
are essential for organizing and communicating knowledge about different
organisms. Carl Linnaeus developed the modern system for classifying living
organisms in 1735.
Species Concepts
● Morphological Species Concept: Species are groups of organisms with
shared morphological traits. For example, lions and tigers are different
species with distinct physical characteristics.
● Binomial Nomenclature: Linnaeus also developed the binomial system for
naming species, using genus and species names. Examples include Homo
sapiens and Panthera leo.
Biological Species Concept
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