PLS 150 Study Guide - Quiz Guide: Poa Pratensis, Binomial Nomenclature, Lumpers And Splitters
29 Sep 2016
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Final Version - PLS 150 Study Guide, Exam 1
Scientific names and how to write them (Species, Genus and Linnaeus) (this is actually page 41-42 so
you should read those too, they will come back on the 2nd exam)
Binomial Nomenclature: The system where we use two names to name plants
* Plant classification system
Common vs. Scientific names:
* Carl Linneaus devised system
* Scientific names are universal
Common names can vary widely for same plant
a. Example: Kentucky blue grass in America but in Europe it's called meadowgrass
b. Poa = blue grass
c. Poa pratensis
d. Also called 'Latin' names because names are 'Latinized'
e. Genus & species:
f. Genus always capitalized
g. Genus = a 'Latinized' noun
h. Species are not capitalized
i. Species = often an adjective
j. "binomial nomenclature"
k. 'lumpers' vs. 'splitters' among taxonomists
l. Lumpers cram everything together to have fewer subdivisions
m. Splitters
n. Naming of plants based on International Code of Nomenclature for Cultivated Plants
o. Hybrid designated by 'X' between species that are crossed
p. With plants two species can be combined together and produce good offspring
Know the what the Big Bang was:
• The Universe started from a single, infinitely dense point
• 13.7 billion years ago
• All matter created in this universe
• Everything expanded outward
find more resources at oneclass.com
find more resources at oneclass.com
Know covalent, hydrogen and ionic bonds – know what a molecule is, know what an atom is
Types of bonds:
Covalent
• Atoms are bonded to form molecules
• Strongest bond type – covalent
• Generally will not fall apart easily and require energy to break
• Like a divorce, can be done, but requires a lot of time and energy
• Sharing electrons between atoms
Ionic
• Very weak
• Ions are atoms with charge (+ or -)
• Just like teeney-tiny magnets
• Fall apart in water or when they come in contact with other ions
• Not stable without other ions
• Like a one night stand – doesn't usually stick around when it's all over
• All salts are ionic
• Ionic= definition of salt
• Giving up and getting electrons between atoms, to form little magnets
Hydrogen
• Super weak
• Molecules act like magnets – this is the difference between Hydrogen/ionic bonds
• Molecule acts like it has two charges – positive and negative
• Called dipolar molecules
• Assemble and disassemble a million times a second, "sticky" bond
• More attraction than bond
• Water has two sides that stick to opposite sides of other water molecules
Atoms:
• Single atoms are the smallest unit of any element
o This is why it's important
• Atoms can be divided but are then just generic particles
• Atoms are the building blocks of matter, or elements
• Everything is made up of atoms
Molecules:
• When atoms combine, molecules are formed
• Molecules can be very small or very large
Know why carbon is important:
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Final version - pls 150 study guide, exam 1. Scientific names and how to write them (species, genus and linnaeus) (this is actually page 41-42 so you should read those too, they will come back on the 2nd exam) Binomial nomenclature: the system where we use two names to name plants. Common names can vary widely for same plant. Example: kentucky blue grass in america but in europe it"s called meadowgrass: poa = blue grass. Poa pratensis: also called "latin" names because names are "latinized, genus & species, genus always capitalized. Genus = a "latinized" noun: species are not capitalized, species = often an adjective. Know the what the big bang was: the universe started from a single, infinitely dense point, 13. 7 billion years ago, all matter created in this universe. Know covalent, hydrogen and ionic bonds know what a molecule is, know what an atom is.
