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