Bio121 EFGHIKL Flashcards

1
Q

ecosystem

A

a community of organisms and its physical environment in a given area

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2
Q

ectoderm

A

in animal embryology, the outermost layer of germ cells that differentiates into the epidermis and nervous system

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3
Q

egg

A

the haploid female gamete

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4
Q

embryo

A

the early stage of development in multicellular diploid plants and animals

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5
Q

endoderm

A

in animal embryology, the innermost layer of germ cells that lines the gut and differentiates into many different tissues

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6
Q

esophagus

A

a hollow tube that conducts food from the pharynx to the crop in earthworms (phylum Annelida) or to the stomach in vertebrates (phylum Chordata)

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7
Q

eukaryotic

A

cells or organisms containing membrane-bound organelles and a true nucleus
includes plants, animals, fungi and protists

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8
Q

extracellular

A

situated or occurring outside of a cell

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9
Q

eye spot

A

a cluster of light sensitive cells found on the heads of some primitive animals, enables detection of light
eg. Planaria of the phylum Platyhelminthes

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10
Q

female gamete

A

the haploid cell (often called an egg) that fuses with a male gamete (sperm) to form a diploid zygote

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11
Q

female gametophyte

A

in plants, a multicellular haploid generation that produces one or more eggs

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12
Q

fertilization

A

the union of two gametes such as egg and sperm to produce a diploid zygote

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13
Q

filament

A
  1. chain of cells
    eg. filamentous bacteria or algae
  2. the stalk of the stamen in flowering plants (phylum Anthophyta)
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14
Q

filter feeding

A

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

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15
Q

fimbriae

A

in bacteria, hair-like extensions used for attachment to surfaces

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16
Q

flagellum (plural flagella)

A

a long cellular projection used for cell motility or movement of extracellular fluid
prokaryotic flagella differ in structure from eukaryotic flagella

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17
Q

floral tube

A

the fused bases of the sepals, petals, and stamens of a flower

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18
Q

flowering plant

A

a plant that has seeds enclosed in fruit

an angiosperm

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19
Q

food vacuole

A

a membrane-bound organelle that contains and digests food obtained by phagocytosis
eg. in Amoeba and Paramecium

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20
Q

foot

A
an organ of locomotion differing widely in different animals
eg. a tube foot of starfish
muscular foot of mollusks
tarsus of insects
food of a vertebrate
21
Q

fragmentation

A

a type of asexual reproduction whereby a new individual develops from a fragment of the parent individual

22
Q

free-living

A

an organism that does not require a host to survive and reproduce
not parasitic

23
Q

freshwater

A

refers to bodies of water with low concentration of dissolved salts

24
Q

fruit

A

ripened ovary which contains seeds in flowering plants

25
Q

funiculus

A

a stalk that connects the ovule/seed to the placenta of the ovary in flowering plants

26
Q

gametangium

A

a cell or organ where gametes are produced

found in plants, some fungi, and some protists

27
Q

gamete

A

a haploid reproductive cell which combines with another gamete during sexual reproduction
eggs and sperm are gametes

28
Q

gametophyte

A

the multicellular haploid generation in the life cycle of a plant
produces gametes by mitosis

29
Q

gastrovascular cavity

A

a body cavity with a single opening (mouth/anus) which functions to both digest and distribute nutrients

30
Q

gelatinous sheath

A

a jelly-like layer surrounding cells of some algae and some bacteria
it holds the cells together and provides protection from predators and the environment

31
Q

gill in fungi

A

the thin structures on the underside of a mushroom cap which produce spores

32
Q

gill in aquatic animals

A

a respiratory structure for gas exchange

33
Q

gizzard

A

a muscular structure capable of grinding up food in the digestive tract of some annelids and birds

34
Q

gymnosperm

A

a plant that produces seeds that are not enclosed in fruits

35
Q

haploid

A

a cell or organism which has only one set of chromosomes

36
Q

herbivore

A

consumer that eats plant tissue

37
Q

hermaphroditic

A

an animal that has both male and female reproductive structures on one individual (bisexual)

38
Q

heterocyst

A

a cell in some cyanobacteria which is specialized for nitrogen fixation

39
Q

heterotroph

A

an organism which cannot synthesize all of the organic material that it needs and therefore must obtain its food and energy from other organisms

40
Q

holdfast

A

a specialized root-like structure in some large algae which allows them to attach to rocks to withstand waves and tides

41
Q

hydrostatic skeleton

A

a skeleton system composed of fluid held under pressure in a closed body compartment
the main skeleton of cindarians, flatworms, roundworms, and segmented worms

42
Q

hypha (plural hyphae)

A

in fungi, a long narrow strand of cells which makes up the body of a fungus

43
Q

intestine

A

part of the digestive tract of an animal

44
Q

intracellular

A

situated or occurring inside of a cell

45
Q

invertebrate

A

an animal that does not possess a vertebral column/spine

46
Q

kingdom

A

in classification, a group made up of one or more phyla

47
Q

larva

A

the pre-adult form of many animals that is morphologically different from the adult

48
Q

locule

A

in flowering plants, a cavity within an ovary in which ovules are produced