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118 Cards in this Set

  • Front
  • Back
Ecosystem
all the organisms in a particular area along with physical components of the environment
ecosystem services
enhance the life-supporting attributes of the atmosphere, surface water, soil, and other physical components of an ecosystem. Facilitated by green algae and land plants
Cuticle
waxy wateright sealant that covers the plant and gives it the ability to survive in dry conditions
Plant adaptations to dry conditions
prevention of water loss, transportation of water via vascular tissue
Stomata
Porous structures that allow water and gases in and out of the cells - can be controlled
Starch
storage product in plants and green algae
Artificial selection
humans actively selecting individuals with the largest and most nutritious seeds
Bryophytes
Non-vascular plants
Vascular tissue
specialized groups of cells that conduct water and nutrients from one part of the plant body to another
Lignin
strengthened early water-conducting cells - a complex polymer built from six carbon rings - tough to break down
Tracheids
long thin water conducting cells - contain a lignin secondary cell wall and a cellulose primary cell wall - as well as pits that
Vessel Elements
most specialized type of water-conducting - allow water movement extremely efficiently
Seed
Embryo and a store of nutritive tissue, surrounded by a tough protective layer
Angiosperms
seed plants that also flower
Gymnosperms
seed plants with "naked seeds"
Sporopollenin
Coating that encases spores and pollen and helps them resist drying
Sporangia
spore producing structures
Gametangia
specialized reproductive organs - protected gametes from drying and damage
Antheridium
sperm producing structure
Archegonium
egg producing structure
Transfer cells
facilitate exchange of nutrients between parent and child (occurs after retention of the embryo)
Embryophyta
Embryo plants
Gametophyte
multicellular haploid stage that produces gametes by mitosis
Sporophyte
multicellular diploid stage that produces spores by meiosis
Heterospory
production of two distinct types of spore producing structures and thus two distinct types of spores
Microsporangia
microspore producing structures - these develop into male gametophytes that produce sperm
Megasporangia
megaspore producing structures - these develop into female gametophytes that produce eggs
Pollen grain
male gametophyte that is surrounded by a tough coat of sporopolennin - easily dispersed to new locations
Flower
Reproductive organ in angiosperms
Stamen
contains an anther where microsporangia develop
Carpel
contains an ovary where ovules are found
Fruit
structure that is derived from the ovary that encloses seeds - attracts animals
Double Fertilization
one sperm fuses with the egg to form the zygote, a second fuses with two nuclei to form an endosperm
Endosperm
triploid nutritive tissue - used as food for the growing plant
Lichens
stable associations between green algae and fungi or cyanobacteria and fungi
Rhizoids
anchor byrophytes to soil rocks or tree bark
annual
single growing season
perennial
live for many years
Fungi
eukaryotic heterotrophic organisms devoid of chlorophyll, obtain nutrients by absorption, reproduce using spores
Parasites
lower hosts' fitness
mutualists
benefit their hosts' fitness
Yeasts
Single celled fungi essential to bread, soy sauce, tofu, cheese, beer, wine, whiskey production
Mycelia
multicellular filamentous forms that are dynamic and made up of hyphae
Heterokaryotic
Several haploid nuclei that don't fuse
Septa
separate filaments into compartments - contain pores that allow materials to flow between compartments
Coenocytics
don't contain septa
Mycetes
Fungi
Chytrid
swimming flagellated gametes/spores
Zygosporangia
haploid hyphae from two individuals meet and become yoked together
Basidia
inside mushroom, puffball, or bracket - specialized cells that form at the ends of hyphae and produce spores - have lots of folding to increase surface area - form fairy rings
Asci
specialized sac-like cells at the ends of hyphae that produce spores above ground
Symbiotic relationship
relationship with close association
mutualism
symbiotic relationship in which two species benefit from their assocation
Commensalism
one species benefits while the other is unaffected
Mycorrhizal
below ground
endophytic
above ground
Ectomycorrizhal fungi (EMF)
Dense network of hyphae that cover roots of plant and extend into soil - release peptidases
Arbuscular mycorrhizal fungi (AMF)
Grow into cells and directly contact plasma membrane
Glomalin
glycoprotein that helps bind organic compounds to sand or clay particles
Extracellular digestion
fungi synthesize digestive enzymes and then secrete them outside their hyphae into their food
Lignin peroxidase
breaks down lignin
Cellulase
Breaks down cellulose
Plasmogamy
occurs when cytoplasms fuse
Karyogamy
occurs when the nuclei fuse
Chytridiomycete
Exhibit alternation of generations - produce swimming gametes
Zygomycete
Form yoked hyphae that produce a spore-forming structure (zygosporangium)
Basidiomycota
Reproductive structures with many spore-producing basidia
Asocomycota
Reproductive structures with many spore producing asci
Body Plan
fundamental architecture of animals
Cephalized body
one with a distinct head region
Tissues
tightly integrated structural and functional units
epithelium
layer of tightly joined cells that covers the surface
diploblasts
two types of tissue - ectoderm and endoderm
triploblasts
three types of tissue - ectoderm, mesoderm, endoderm
ectoderm
gives rise to skin and nervous system
endoderm
gives rise to the lining of the digestive tract
mesoderm
gives rise to circulatory system, muscle, and internal structures like organs
Nerve net
a diffuse arrangement of nerve cells
Central Nervous System
neurons clustered into one or more large tracts and projected throughout the body
Ganglia
Masses of neurons - aka brains
Radial symmetry
at least two planes of symmetry
Bilateral symmetry
one plane of symmetry and usually a long narrow body
Coelom
enclosed fluid-filled cavity
acoelomates
triploblasts that lack coelom
hydrostatic skeleton
allows soft bodied animals to move effectively even without limbs
protostomes
mouth develops before the anus
deuterostomes
anus develops before the mouth
sessile
permanently attached to substrate
Choanocytes
sponge feeding cells
Ecdysozoans
grow by shedding their external skeletons
Lophotrochozoans
grow continuously when conditions are good
Segmentation
presence of repeated body structures
vertebrates
defined by the presence of a skull and (usually) backbone - monophyletic
invertebrates
all animals that are non vertebrates - paraphyletic
Suspension feeders
filter feeders - capture food by filtering out particles in the air or water
deposit feeders
ingest organic material that has been deposited within a substrate or on its surface
fluid feeders
suck of mop up liquids like nectar, plant sap, blood, or fruit juice
mass feeders
take in chunks of food in their mouths
Herbivores
feed on plants or algae
Carnivores
feed on animals
detritivores
feed on dead organic matter (detritus)
omnivores
eat both plants and animals
Endoparasites
live inside their hosts
Ectoparasites
live outside their hosts
Distal-less
Dll - a gene that tells embryos where to grow appendages
Viviparous
nourish embryos inside their body and give birth to live young
Oviparous
Deposit fertilized eggs
Ovoviviparous
Females retain eggs inside their body but these eggs are nourished by yolk
Metamorphosis
change from an immature body type to an adult body type
Larvae
live in different habitats and eat different foods
Juveniles
sexually immature
adults
reproductive stage of life cycle
hemimetabolous metamorphosis
incomplete - young are juveniles called nymphs that look like miniature versions of the adult
holometabolous metamorphosis
complete - young are larvae
Pupa
Individual that is completely remodeling its body into a new adult form
Polyp
reproduces asexually - largely sessile form of cnidarians
Medusa
reproduces sexually - form of cnidarians
Colony
group of identical individuals that are physically attached