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Biology Term 2
Midterm 2
125
Biology
Undergraduate 1
10/28/2012

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Term
Lichens
Definition
Fungi + algae
Term
Angiosperms
Definition
Flowering plant, seeds form in ovary
Term
Basidiocarp
Definition
The elaborate fruiting body of a dikaryotic (two haploid nuclei per cell) mycelium of a club fungus
Term
Basidium (plural basidia)
Definition
The reproductive appendage on the gills of mushrooms that produces spores
Term
Conidia (singular conidium)
Definition
haploid spore produced at the tip of a specialized hypha in ascomycetes during asexual reproduction
Term
Ascocarp
Definition
the fruiting body of a sac fungus
Term
Ascus
Definition
a saclike spore capsule located at the tip of the dikaryotic hypha of a sac fungus
Term
Chitin
Definition
The polysaccharide that is found in the cell walls of fungus and anthropod exoskeletons
Term
Haustorium
Definition
A specialized hypha that can penetrate the tissues of host organisms
Term
Zygosporangium
Definition
In zygomycete fungi, a sturdy multinucleate structure in which karyogamy and meiosis occur
Term
Anthophyta
Definition
The clade that includes the angiosperm and extinct lines of flowering plants
Term
Mycorrhizae
Definition
The symbiotic relationship betwen fungus and plant roots. The fungus gets sugars and the plant gets water and minerals
Term
Basidiomycota
Definition
Sexual spores are produced in the basidium, basidiocarp is the fruiting body. Include important lignin decomposers (shelf fungi)
Term
Ascomycota
Definition
Largest group, sexual spores produced in asci, asexual reproduction by naked spores
Term
Zygomycota
Definition
Resistant spherical spores are formed in the zygosporangium, form coenocytic hyphae (no cytokinesis)
Term
Arbuscules
Definition
arbuscular mycorrhiza is when the fungus enters a plant's cell wall and folds the plasma membrane in (forming arbuscules), gaining nutrients from the cell as they are passed through the plasma membrane
Term
Glomeromycota
Definition
Few known species, but 90% of plant species are known hosts. Form arbuscules
Term
Chytridiomycota
Definition
Most ancestral fungi group, globular fruiting body, only group with flagellated zoospore and gametes
Term
Dikaryotic mycelium
Definition
two haploid nuclei per cell
Term
Heterokaryon
Definition
(n+n) Two haploid nuclei
Term
Sepal
Definition
The small, leaf-like pieces that surround the petals before the flower opens
Term
Karyogamy
Definition
Two haploid nuclei fuse to form one diploid nuclei
Term
Plasmogamy
Definition
Two hypha of +/- mating types fuse their cytoplasm
Term
Carpel
Definition
The female part of the flower (includes stigma, style, ovary, and ovules)
Term
Coenocytic
Definition
A fungus that lacks septa and whose body is made of a continuous cytoplasmic mass that may contain hundreds or thousands of nuclei
Term
Septa
Definition
The internal cross walls that divide hyphae into multiple cells
Term
Septate
Definition
Septum with pore separates cell, allows transfer of cytoplasm
Term
Fruiting Body
Definition
Where spore producing structures form
Term
Mycelium
Definition
The densely branched network of hyphae in a fungus
Term
Hyphae
Definition
Single-cell wide filaments that make of the mycelium
Term
Petal
Definition
The colorful part of the flower
Term
Absorptive Nutrition (two steps)
Definition
1. hyphae secrete hydroliytic enzymes (digestion occurs outside of organism)
2. Absorption of broken down simple organic molecules
(Hyphae have more surface area and can break down cellulose and, sometimes, lignin)
Term
Cotyledon
Definition
Becomes the first leaves of a new seedling (monocots have one, dicots have two)
Term
Endosperm
Definition
Triploid (3n) nutritional material that is made when the second sperm fuses with the two polar nuclei in the ovule
Term
Double fertilization
Definition
Two sperm cells from a pollen grain enter the ovule. One fertilizes the egg cell, and the other fertilizes the two polar nuclei to make up the endosperm
Term
Central cell
(Polar nuclei)
Definition
Form 3n endosperm
Term
Embryo sac
Definition
8 nuclei, 7 cells - forms the outside of the seed
Term
Tube cell
Definition
Develops into the pollen tube that transports the sperm down the style to the ovules
Term
Generative cell
Definition
Cell in pollen that divides to give rise to sperm
Term
Microspore
Definition
(n) male gametophyte (pollen) / sperm
Term
Stamen
Definition
The male part of the flower (includes the anther and the filament)
Term
Megaspore
Definition
(n) female gametophyte / egg
Term
Pollen grain
Definition
a single piece of pollen
Term
Fruit
Definition
Develops from the ovary of the flower
Term
Perfect Flower
Definition
Has both male and female reproductive parts concurrently
Term
Monoecious
Definition
Has both male and female parts
Term
Dioecious
Definition
No plant produces both male and female gametophyte, but only one or the other (think ginkos)
Term
Deciduous
Definition
Trees that lose their leaves in the winter
Term
Nectary
Definition
the part of the flower that secretes nectar
Term
Ovary
Definition
Surrounds the ovules, forms the fruit
Term
Style
Definition
The stem-like part that attaches the ovary to the stigma
Term
Filament
Definition
The stem-like part that attaches the anther to the flower
Term
Stigma
Definition
The sticky part of the flower that pollen adheres to
Term
Anther
Definition
Where the pollen is
Term
Cilia
Definition
Hairlike structures on the outside of eukaryotic cells that help facilitate movement and/or feeding
Term
Protista
Definition
A polyphyletic "kingdom" consisting of eukaryotic organisms that are not plants, animals, or fungi
Term
Phytophthora
Definition
Plant parasites; water mold (Oomycetes)
Term
Oomycetes
Definition
Water mold; potato blight
Term
Secondary Endosymbiosis
Definition
Eukaryotic cell engulfs an algal cell and uses its photosynthetic properties for energy
Term
Brown Algae
Definition
Largest algal species
Term
phytoplankton
Definition
photosynthetic plankton
Term
frustule
Definition
Hard, porous external wall of diatoms; composed mainly of silica
Term
Diatoms
Definition
Have frustules; most common types of phytoplankton
Term
Stramenopiles (Heterokonts)
Definition
most are algae; flagellate cells have two types of flagella
Term
Microtubule
Definition
cylindrical component of cytoskeleton
Term
Clade
Definition
A group consisting of an ancestor and all of its descendants
Term
Flagella, eukaryotic
Definition
Made of cell membrane
Term
micronucleus
Definition
controls reproductive functions only
Term
macronucleus
Definition
contains DNA for everything but reproductive functions
Term
Conjugation (in ciliates)
Definition
exchange of haploid (that have undergone meiosis) nuclei between two cells
Term
Ciliates
Definition
Have cilia
Term
Plasmodium
Definition
Apicomplexan parasites. Infection by these organisms is known as malaria
Term
Apical complex
Definition
Structure that allows Apicomplexans to penetrate a host's cells
Term
Apicomplexans
Definition
Animal parasites; have apical complex;
Term
plankton
Definition
Any organisms that live in water and cannot swim against a current
Term
Cladistics
Definition
The science of phylogeny
Term
Monophyletic
Definition
A proper clade: an ancestor and all of its decendants
Term
Parabasalids
Definition
In excavata; contain the organisms that help termites digest wood; lack mitochondria
Term
Alveoli
Definition
in ciliates; vesicles under the cell membrane that provide shape
Term
Dinoflagellates
Definition
Marine plankton; "whirling" flagellum
Term
Kinetoplastids
Definition
presence of a kinetoplast, a DNA-containing granule located within the single mitochondrion associated with the base of the cell's flagella (the basal body)
Term
Euglenozoans
Definition
Two flagella, some of which are associated with a "mouth"; contains euglenids and kinetoplastids
Term
Euglenids
Definition
thought to descend from an ancestor that took up green algae by secondary endosymbiosis
Term
Alveolates
Definition
presence of cortical alveoli, flattened vesicles packed into a continuous layer supporting the membrane; contains Apicomplexa, Chromerida,Ciliates, Dinoflagellates
Term
Parasitic Symbiosis
Definition
One organism harms the other as they live in close contact
Term
Mutualistic Symbiosis
Definition
Two organisms living in close contact with each other; both benefit
Term
Polyphyletic
Definition
Contains only some of the organisms in a monophyletic clade
Term
Mitosome
Definition
Found in some unicellular eukaryotic organisms; all organisms with mitosomes do not have mitochondria
Term
Diplomonads
Definition
Mostly parasites; giardia; have two nuclei and four flagella
Term
Excavata
Definition
lack classic mitochondria
Term
Clade
Definition
A group consisting of an ancestor and all of its decendants
Term
Phylogeny / Phylogenetic tree
Definition
Study of evolutionary relationships between organisms
Term
Phytoplankton
Definition
photosynthetic plankton
Term
Producer
Definition
synthesizes organic compounds
Term
Mixotrophic
Definition
Can be either autotrophic or heterotrophic depending on conditions
Term
Paraphyletic
Definition
Contains all of the organisms in a monophyletic clade and more
Term
Rhizaria
Definition
Supergroup of mostly unicellular eukaryotes; have mictotubule supported pseudopods
Term
Ginkgophyta
Definition
Only one extant species; separate male and female trees
Term
Gnetophyta
Definition
Woody plants in gymnosperms; highly diverse within gnetophyta
Term
Cycadophyta
Definition
Palm-like; evergreens
Term
Coniferophyta
Definition
Cone bearing trees; no ovaries
Term
Gymnosperm
Definition
Seed producing plants that do not have flowers
Term
Pollen tube
Definition
The tube created to transport the sperm to the ovules
Term
Seed Coat (testa)
Definition
Develops from integument; keeps embryo safe and protects against desiccation
Term
Seed
Definition
Small embryonic plant sporophyte
Term
Micropyle
Definition
The small opening in the ovule that the pollen tube penetrates
Term
Radiolarians
Definition
amoeboid protozoa; intricate mineral skeleton; zooplankton
Term
Integuments
Definition
tough outer layer of ovule
Term
Ovule
Definition
plant egg
Term
Microspores
Definition
develop into male gametophytes; haploid
Term
Megaspores
Definition
develop into female gametophytes; haploid
Term
Heterosporous
Definition
Produce male and female spores
Term
Homosporous
Definition
Produce one spore that develops into a hermaphrodite gametophyte; mostly in ferns
Term
Bisexual gametophyte
Definition
Gametophytes of homosporous plants; produce both eggs and sperm
Term
Pterophyta
Definition
Non seed plants with vascular tissue; ferns
Term
Sporophyte
Definition
The spore producing stage; diploid
Term
Lycophyta
Definition
Club mosses; seedless vascular
Term
Rhizoids
Definition
Root like structures that provide stability; absorb water
Term
Sporopollenin
Definition
major component of the tough outer walls of spores and pollen grains
Term
Sporangium
Definition
The enclosure in which spores are formed; diploid
Term
Gametangia
Definition
The organ where gametes are produced; haploid
Term
Antheridium
Definition
Produces male gametes; haploid
Term
Archegonium
Definition
Produces female gametes; haploid
Term
Bryophyta
Definition
mosses; non vascular; gametophyte dominant
Term
Bryophyte
Definition
all non vascular land plants
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