Growth rings
Layers of wood formed in tree or other woody plant during one growth period.
Adaptation
Adaptation
The process of adjusting to the environment over time. For example a plant with unusually long roots, enabling it to absorb water over a wide area, may be more likely to survive during periods of drought.
Habitat
Habitat
An area that provides an animal or plant with adequate food, water, shelter, and living space in a suitable arrangement.
Adapted
Adapted
Suited to certain conditions in the environment.
Herbivores
Herbivores
An organism that feeds on vegetation.
Aquatic
Aquatic
Living or growing in water.
Leaf Litter
Leaf litter
Dead plant material, such as bark, leaves, and twigs, that has fallen to the ground.
Bacteria
Bacteria
Single-celled microorganisms that lack chlorophyll. Many bacteria break down organic matter in the air, water, and soil. Some bacteria are capable of causing diseases in humans, other animals, and plants.
Mammal
Mammal
A type of animal that has hair or fur covering its body and that produces milk for its young.
Carbohydrates
Carbohydrates
Sugars, starches, and celluloses that are produced by green plants and that are important nutritional sources of energy for many animals.
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