Organism that obtains its energy from abiotic sources, such as sunlight or inorganic
All of the individuals of a species that live in the same area
Living things, such as plants, animals, fung
The Nutrient Cycles:
The hydrologic, or water cycle is the circular pathway of water on Earth.
Organisms all have bodies made mostly of water. It is essential to life.
The Endosymbiotic Theory
The first eukaryotes may have formed from one bacteria engulfing
another without killing it.
Later a symbiotic relationship was formed
Stop and Think
Are plant and animal cells prokaryotic or eukaryotic?
Changes in Ecosystems:
Natural, gradual changes in the types of species that live in an
area; can be primary or secondary
The gradual replacement of one plant community by another
through natural processes over time
Why is water polar?
Carbon atoms have unique bonding properties.
Carbon forms covalent bonds with up to four other atoms, including
other carbon atoms.
Many carbon-based molecules are made of many small subunits
Human Impact on the Environment
Types of Resources
Renewable: replaced by natural processes Ex: plants/crops, water
Types of Resources
Nonrenewable: only available in limited amounts Ex: Old-growth forest, tropical
rain forest, Metals, minerals, topsoil,
Ecology is the study of the way living things interact with each other and their physical
How does energy flow?
Organisms that use energy from the environment (make their own food) through sunlight
Characteristics of Living Things
A. Characteristics of Living Things
a. What makes something living?
b. No one single characteristic makes an organism living.
c. Instead, living things share several characteristics.
d. These characteristics include the fo
The Cell Theory
In 1855, a number of scientists put together a theory about cells
All living things are composed of Cells.
Cells are the basic unit of structure and function in
New cells are produced from existing cells.
Cell Transport Notes
Isotonic, Hypotonic, Hypertonic
The Cell Membrane
Maintains homeostasis for the cell by allowing waste and other products to leave the cell.