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System - an organized group of related parts that interact to form a whole.
You are part of an ecosystem, which is a physical environment with different species that interact with one another and nonliving things.
Adaptation - an inherited trait that gives an advantage to individual organisms and is passed on to future generations.
A systems biologist is interested in networks and pathways that sustains life. It's a relatively new field of biology made possible through technology.
Climate
Altitude
Pollution
Sunlight
Scanning this section in the book (1.2), which themes are related to this pair?
Homeostasis - maintenance of constant internal conditions within the organism
This can mean temperature, blood sugar, acidity, and other conditions. Behavior can also be involved in homeostasis.
Polar bear has black skin, which absorbs heat more readily. It has hollow transparent hair, which helps it retain body heat.
It also has fat deposits to keep it warm.
For example, in the human body, red blood cells and brain cells have different shapes, and therefore different functions.