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Zoology
Study of animals, including their biology and behavior.
Ethology
Study of animal behavior in natural environments.
Ecology
Study of organisms and their environment interactions.
Anatomy
Study of organism structure and parts.
Physiology
Study of functions and mechanisms in living systems.
Evolution
Process of species development and diversification.
Adaptation
Process by which species adjust to their environment.
Habitat
Natural environment where organisms live.
Niche
Role or function of an organism within an ecosystem.
Territory
Area defended by animals against others of the same species.
Ecosystem
Community of organisms interacting with their environment.
Autotroph
Organism producing its own food from inorganic substances.
Heterotroph
Organism obtaining food by consuming other organisms.
Herbivore
Animal feeding primarily on plants.
Carnivore
Animal feeding primarily on other animals.
Omnivore
Animal consuming both plants and animals.
Arboreal
Living in or adapted to trees.
Aerial
Living or occurring in the air.
Terrestrial
Living on land.
Aquatic
Living in water.
Marine
Living in or produced by the sea.
Subterranean
Living or occurring underground.
Amphibious
Capable of living both on land and in water.
Sessile
Fixed in one place; immobile.
Food Chain
Series of organisms dependent on each other for food.
Diurnal
Active during the day.
Crepuscular
Active during twilight (dawn and dusk).
Nocturnal
Active during the night.
Asymmetrical
Lacking symmetry.
Bilateral Symmetry
Body symmetry with mirror images on left and right.
Radial Symmetry
Symmetry around a central axis.
Anterior
Situated towards the front of the body.
Posterior
Situated towards the rear of the body.
Ventral
Pertaining to the belly or underside of an animal.
Dorsal
Pertaining to the back or upper side of an animal.
Cross-Section
Transverse cut through a structure.
Lateral View
Side view of an object.
Longitudinal View
View along the length of an object.
Ectothermic
Reliant on external heat sources.
Endothermic
Generates internal heat to regulate body temperature.
Hermaphroditic
Possessing both male and female reproductive organs.
Exoskeleton
External skeleton supporting and protecting an animal's body.
Invertebrate
Animal lacking a backbone.
Vertebrate
Animal with a backbone.
Gestation Period
Period of embryo development in the womb.
Coelom
Body cavity lined with mesoderm.
Pseudocoelom
Incomplete body cavity lined with mesoderm.
Ectoderm
Outermost layer of cells in an embryo.
Endoderm
Innermost layer of cells in an embryo.
Mesoderm
Middle layer of cells in an embryo.
Hibernation
State of reduced metabolism during winter.
Aestivation
State of dormancy during hot or dry periods.
Parasitic
Living at the expense of another organism.
Free-Living
Living independently of another organism
Budding
Asexual reproduction where offspring develop from outgrowths.
Regeneration
Ability to regrow lost body parts.
Sexual Reproduction
Reproduction involving genetic contribution from two parents.
Ganglion
Collection of nerve cell bodies.
Endangered Species
Species at risk of extinction.
Extinct
Species that no longer exists