Biological Diversity Flashcards

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1
Q

Taxonomy

A

A system by which we name & classify all organisms, living & extinct

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2
Q

Binomial Nomenclature

A

System used today by Carl von Linne, every organism has 2-part name

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3
Q

Domains

A

Bacteria, Archaea, Eukarya

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4
Q

Four kingdoms of Eukarya

A

Protista
Fungi: yeast, mold, mushrooms
Plantae: mosses, ferns, flowering plants
Animalia

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5
Q

Evolutionary Trends in Animals

A
Specialized Cells, Tissues & Organs
Germ Layers
Body Symmetry
Development of Head
Body Cavity Formation
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6
Q

Tissue

A

Group of similar cells that perform one function

Sciatic nerve

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7
Q

Organ

A

Group of issues that work together to perform related functions

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8
Q

Germ Layers

A

Main layers, form various tissues & organs of the body, formed in embryonic development

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9
Q

Ectoderm

A

Outermost layer, becomes skin & nervous system

Nerve cord + brain

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10
Q

Endoderm

A

Innermost layer, becomes viscera (guts) or digestive system

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11
Q

Mesoderm

A

Middle layer, becomes blood, muscles & bones

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12
Q

Coelom

A

A fluid-filled body cavity that is completely surrounded by mesoderm tissue
Provides space for elaborate organ systems
Ex: digestive tract or cardiovascular system

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13
Q

Porifera

A

Sponges

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14
Q

Cnidarians

A

Hydra & Jellyfish

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15
Q

Platyhelminthes

A

Flatworms including Tapeworms

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16
Q

Nematodes

A

Roundworms

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17
Q

Annelids

A

Segmented Worms like Earthworms, Leeches

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18
Q

Mollusks

A

Squids, Octopuses, Slugs, Clams, and Snails

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19
Q

Arthropods

A

Insecta (Grasshopper), Crustacea (Shrimp, crab), Arachnida (Spider)

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20
Q

Echinoderms

A

Sea Stars (Starfish) & Sea Urchins

21
Q

Chordates

A

Fish, Amphibians, Reptiles, Birds, Mammals

22
Q

Cladogram/polygenetic Tree

A

Diagrammatic representation of the evolutionary history that all living things evolve from the last universal common ancestor (LUCA)

23
Q

Taxa

A

Levels of organization in system of classification;

Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species

24
Q

Extremophiles

A

Organisms that live in extreme environments

Make up domain Archaea

25
Q

Three-Domain System

A

Based on DNA analysis, reflects evolutionary history & the relationships among organisms
Bacteria, Archaea, Eukarya

26
Q

Decomposer

A

Organisms that play a vital role in the ecosystem & that recycle dead organic matter
Bacteria & Fungi

27
Q

Pathogen

A

Organism that causes disease

28
Q

Genetic Engineering

A

Branch of science that uses recombinant DNA techniques for practical purposes

29
Q

Conjugation

A

A primitive form of sexual reproduction where individuals exchange genetic material

30
Q

Methanogens

Extremophile

A

Organisms that obtain energy in a unique way by producing methane from hydrogen

31
Q

Halophiles

Extremophile

A

Organisms that thrive in environments with high salt concentrations like Utah’s Great Salt Lake

32
Q

Thermophiles

Extremophiles

A

Organisms that thrive in very high temperature, like in hot springs in Yellowstone Park

33
Q

Saprobes

A

Organisms that obtain food from decaying organic matter

34
Q

Pioneer Organisms

A

The first to colonize a barren environment in primary ecological succession

35
Q

Cell

A

Basic unit of all forms of life

36
Q

Mesoglea

A

The middle layer of a 2-layered animal, which holds the 2 layers together

37
Q

Tripoblastic

A

Animal consisting of 3 cell layers

Every animal more sophisticated than flatworms

38
Q

Pseudocoelomate

A

An animal with a false coelom

Fluid-filled tube between endoderm & mesoderm that support the animal

39
Q

Acoelomate

A

An animal that has no true coelom

40
Q

Gastrovascular Cavity

A

Glastrocoel, primitive digestive tract

Hydra

41
Q

Hermaphrodites

A

Organisms that contain both female & male sex organs

42
Q

Shared Traits

A

Those that organisms have in commmon

43
Q

Derived Traits

A

New characteristics or innovations that are not shared with ancestor

44
Q

Decomposer Fungi

A

Secrets enzymes that breaks down & absorb nutrients from non living organic material

45
Q

Mutualist Fungi

A

Help plants absorb nutrients especially phosphates by breaking them down more efficiently than the roots can themselves, mycorrihaze

46
Q

Predatory Fungi

A

Capture prey

47
Q

Parasitic Fungi

A

Feed on living organisms without killing them

48
Q

Segmentation

A

Repetition of anatomically identical units that can be added to and modified for different purposes as animals evolve