body systems
what is Skeletal System
Provides support and structure, protects internal organs, and allows movement with the muscular system.
what is analogous structures
is a trait or an organ that appears similar in two unrelated organisms
what is cuticle
A waxy covering on the surface of stems and leaves that acts as an adaptation to prevent desiccation in terrestrial plants.
what is Eukaryotic Cell
Cells with membrane bound nucleus, endosymbiosis explains the origin of the organelles
Bilateral Symmetry
Can be cut in half in only one plane to make each half like the other
what is Muscular System
Enables movement of the body and its parts through muscle contractions.
what is biogeography
is the study of the distribution of species and ecosystems in geographic space and through geological time
what is epidermis
he dermal tissue system of nonwoody plants, usually consisting of a single layer of tightly packed cells.
Microevolution
Change of allele frequencies over time. Operates at the population level within species
Radial Symmetry
Asymmetry
what is Nervous System
Controls body functions, responds to stimuli, and helps maintain homeostasis.
what is common anceston
group of organisms share common descent if they have a common ancestor thus all living organisms on Earth are descended from a common ancestor.
what is phloem
Vascular plant tissue consisting of living cells arranged into elongated tubes that transport sugar and other organic nutrients throughout the plant
what is Macroevolution
Large scale changes in allele frequencies operates at the species level and higher levels of taxonomic organization
what is Competition
Interaction between organisms, populations, or species, in which birth, growth, and death depend on gaining a shape of a limited environmental resource
what is Reproductive System
Enables reproduction.
what is embryo
organism in its early stage of development
what is root
An organ in vascular plants that anchors the plant and enables it to absorb water and nutrients from the soil.
what is Speciation
The "formation" of a new species over geological time
what is Evolution
A change in a species over time
what is Circulatory System
Delivers oxygen and nutrients to cells, removes waste products, and regulates body temperature
what is fossil record
the geological record of organisms on earth that have been preserved in the rock in a chronological order (oldest on bottom layers and youngest on top layers)
what is stem
A vascular plant organ consisting of an alternating system of nodes and internodes that support the leaves and reproductive structures.
Fitness
measure of the genetic information contributed to the next generation by an individual (number of surviving offspring produced by the individuals)
Allele
A version or alternate form of a gene