Bio121 EFGHIKL Flashcards
ecosystem
a community of organisms and its physical environment in a given area
ectoderm
in animal embryology, the outermost layer of germ cells that differentiates into the epidermis and nervous system
egg
the haploid female gamete
embryo
the early stage of development in multicellular diploid plants and animals
endoderm
in animal embryology, the innermost layer of germ cells that lines the gut and differentiates into many different tissues
esophagus
a hollow tube that conducts food from the pharynx to the crop in earthworms (phylum Annelida) or to the stomach in vertebrates (phylum Chordata)
eukaryotic
cells or organisms containing membrane-bound organelles and a true nucleus
includes plants, animals, fungi and protists
extracellular
situated or occurring outside of a cell
eye spot
a cluster of light sensitive cells found on the heads of some primitive animals, enables detection of light
eg. Planaria of the phylum Platyhelminthes
female gamete
the haploid cell (often called an egg) that fuses with a male gamete (sperm) to form a diploid zygote
female gametophyte
in plants, a multicellular haploid generation that produces one or more eggs
fertilization
the union of two gametes such as egg and sperm to produce a diploid zygote
filament
- chain of cells
eg. filamentous bacteria or algae - the stalk of the stamen in flowering plants (phylum Anthophyta)
filter feeding
a method of feeding used by many sessile aquatic organisms that involves creating water currents that enable the organism to filter out microscopic organisms or organic material for food
fimbriae
in bacteria, hair-like extensions used for attachment to surfaces
flagellum (plural flagella)
a long cellular projection used for cell motility or movement of extracellular fluid
prokaryotic flagella differ in structure from eukaryotic flagella
floral tube
the fused bases of the sepals, petals, and stamens of a flower
flowering plant
a plant that has seeds enclosed in fruit
an angiosperm
food vacuole
a membrane-bound organelle that contains and digests food obtained by phagocytosis
eg. in Amoeba and Paramecium