Themes in Biology. Lecture 1-2. diversity. evolution. interdependence. I. Diversity and unity of life. Diversity = variety. Unity = things in common. Over 1.5 million species exist on Earth. It can be 1-celled, or a whale with a trillion cells. Each species is different from every other.
Diversity = variety
Unity = things in common
Over 1.5 million species exist on Earth.
It can be 1-celled, or a whale with a trillion cells.
Each species is different from every other.
All living things share a
All life descended from a single common ancestor.
Diversity came from genetic changes happening over time.
Which domain has the most kingdoms?
What process put oxygen into the air?
Slash and burn farming
Populations change, or evolve, over time.
Over time, new species arise, others go extinct.
Evolution explains how life today is related to life in the past.
How are the jack rabbit, musk ox, and snow hare
adapted to their environments?
biology in our local ecosystem.
Oak woodlands ecosystem