Khalil Allen


Population - a community of animals, plants or humans among whose members interbreeding occurs

Carrying Capacity - number of people, other living organisms, or crops that a reign can support w/o environmental degradation

Exponential Growth - growth whose rate becomes ever more rapid in proportion to growing total number or size

Density-Dependent Factor - factor limiting size of population whose effect is dependent on number of individuals in the population

Independent Factors - factor that affects size of population, independent or regardless of population density

Hardy-Weinberg Principle - Principle states that allele & genotype frequencies in a population will remain constant from generation

Gene Flow - is the transfer of alleles of genes from one population to another, migration into or out of population

Nonrandom Mating - mating that has not occurred due to chance, and has human interference

Genetic Drift - variation in relative frequency of different genotypes in a single population

Natural Selection - process whereby organisms better adopted to their environment tend to survive and produce offspring


Stomata - opens due to the turgor pressure

Roots - shallow roots grow in plants in artic tundra because the permafrost prevents plants from sending their roots down past the active layer of soil

Xylem - is a key adaptation marketing the pinnacle of hydraulic efficiency in flowing plants

Phloem - feeding by aphids & grazing by mammalian regulates both significantly more frequent than tundra populations

Flowers - role in sustaining the other life forms that live in this biome

Meristems - located at tip of all roots & shoots the apical; are involved with the extension of the plant body

Seeds - grows vegetation & cottongrass across the tundra

Flower & Structure of a Leaf

Sepal - each of parts of early of the calyx of a flower, enclosing the petals & typically green & leaflike

Petal - each of segments of the Corolla of a flower, which are modified leaves & typically colored

Stamen - male fertilizing organ of a flower, typically consisting of pollen containing anther and a filament

Anther - the part of a stem that contains the pollen

Pistil - the female organs of a flower, comprising the stigma, style, & ovary

Ovary - a female reproductions organ in which ova or eggs are produced, present in humans and other as a pair

Vascular Plants - caribou moss, peat moss, heather and tufted saxatrage

Nonvascular Plants - mosses & liverworts

Gymnosperm - conifers

Angiosperm - Margo Toras

Monocot - poaceae & gramineae

Dicot - Ponderosa pine

Fruits - white grapes, tomatoes, honey berries, citrus, raspberries, peaches, lemons, etc.

Basic Things in Tundra

Caribou (Rangifer tarandus) -

-Body, coat, feet, food




-extremely endangered

Polar Bear (Ursus maritimus)

-thick oily fur

-mating season in spring




Arctic Fox (Vulpes lagopus)

-thick white coat of fur

-mating starts in spring




Musk Ox (Ovibus moschatus)

-outer coat made of long brown hairs

-mating starts late summer, early fall



-not endangered

Eskimo Curlew (Numenius borrealis)

-grey legs

-produce eggs, modify them



-8 species, endangered