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Biology Finals Study Guide
Biology Honors
77
Biology
10th Grade
06/07/2010

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Term
What are the processes of life?
Definition
Reproduction - Metabolism - Homeostasis - Heredity - Evolution
Term
Describe Reproduction
Definition
the process in which organisms make more of its kind from one generation to the next
Term
Describe Heredity
Definition
the passing of traits from parent to offspring
Term
Describe Homeostasis
Definition
the maintenance of stable internal conditions in spite of changes in the external conditions 
Term
Describe Metabolism
Definition
the sum of all of the chemical reactions carried out in an organism
Term
Describe Evolution
Definition
change in the inherited characteristics of species over generations
Term
What are the parts of an ATOM
Definition
the smallest unit of matter that can be broken down by chemical means - made up of electrons, protons, and neutrons - have one electron for each proton
Term
What is an ORGANIC COMPOUND
Definition
made up of carbon atoms which are covalently bonded to other element - usually hydrogen or oxygen
Term
What are AMINO ACIDS?
Definition
the building blocks of proteins
Term
What are CARBOHYDRATES?
Definition
organic compounds made up of carbon, hydrogen and oxygen atoms in the proportion of 1:2:1 
Term
What are LIPIDS?
Definition
nonpolar molecules that are not soluble or mostly insoluble in water - important in the structure and function of cell membranes 
Term
Define Passive Transport
Definition
movement across the cell membrane that does not require energy from the cell
Term
Define Active Transport
Definition
the transport of a substance across the cell membrane against its concentration gradient
Term
What is the SMALLEST unit of life?
Definition
a cell
Term
What is an enzyme? Why are they important?
Definition
specialized proteins that help spread reactions by lowering the activation energy -  They are important b/c they enable your body to react fast enough to keep you alive
Term
Describe Cellular Respiration
Definition
the process cells used to harvest the energy in organic compounds (food) 
Term
Describe Photosynthesis
Definition
process by which light energy is converted to chemical energy
Term
What is a HETEROTROPH
Definition
organisms that must obtain energy from food instead of sunlight
Term
What is a AUTOTROPH
Definition
organisms that get energy from sunlight or inorganic substances instead of food
Term
why is chlorophyll green?
Definition
most plant absorbs blue and red light and reflect green and yellow light making plants and especially there leaves appear green
Term
What is DNA?
Definition
the material that contains the information that determines inherited characteristics
Term
What is TRANSCRIPTION 
Definition
the process of forming a nucleic acid by using another molecule as a template 
Term
What is translation
Definition
the portion of protein synthesis that takes place at ribosomes
Term
what is REPLICATION
Definition
making a copy of DNA
Term
3 types of RNA
Definition

mRNA (messenger RNA)

tRNA (transfer RNA)

rRNA (ribosomal RNA)

Term
What is a CODON?
Definition
where the instructions for RNA are written as a series of three-nucleotide sequences on the mRNA
Term
What are the effects of mutations?
Definition
deletion - duplication - inversion - translation
Term
K P C O F G S
Definition
kingdom - phylum - class - order - family - genus - species
Term
Dominant
Definition
a gene that occurs more often in offspring from generation to generation
Term
Recessive
Definition
A gene that occurs rarely in offspring from generation to generation
Term
Heterozygous 
Definition
if the alleles of a particular gene is present in an individual they are heterozygous
Term
Homozygous 
Definition
if two alleles of a particular gene is present in an individual it is homozygous
Term
Phenotype
Definition
the physical appearance of a person
Term
Genotype
Definition
the set of alleles an individuals has for a character
Term
Cell Cycle
Definition
[image]
Term
Diploid in humans
Definition
when a cell has two sets of chromosomes
Term
Haploid in humans
Definition
when a cell has one set of chromosomes
Term
Sex Chromosomes
Definition
determines the gender of the individual
Term
Natural Selection
Definition
individuals that have physical characteristics or behavioral traits that better suit the enviroment
Term
Ecology
Definition
the branch of biology that studies the interactions of organisms with  one another and the other non-living part of the enviroment
Term
Organisms
Definition
group of organs that work together
Term
Population
Definition
all the individuals of the same species that live in an area
Term
Community
Definition
All of the organisms that live in that area
Term
Ecosystem
Definition
consist of a community and all the physical aspects
Term
Biome
Definition
a major biological community that occurs over a large area of land
Term
Abiotic 
Definition
the physical aspects of a habitat
Term
Biotic
Definition
organisms in a habitat
Term
Succession 
Definition
regular progression of species replacementt
Term
Niche
Definition
the functional role of a particular  species in a ecosystem
Term
Producers
Definition
organisms that first capture energy
Term
Consumers
Definition
organisms that consume plants or other organisms to obtain energy necessary to build their molecules
Term
Bio-geochemical cycles
Definition
the circulation of substances through living organisms from or to the enviroment
Term
Meiosis
Definition
reductional division in which the number of chromosomes is cut in half
Term
Mitosis
Definition
separation of a Eukaryotic cell into two daughter cells
Term
Spermatogenisis 
Definition
the process by which male gametes form
Term
oogenisis 
Definition
the production , growth and maturation of an egg or ovum
Term
Independent assortment
Definition
the random distribution of the pairs of genes on different chromosomes to the gametes
Term
Clone
Definition
exact replication of an organism using asexual reproduction
Term
Taxonomy
Definition
the science of describing, naming and classifying organisms
Term
Cladistics
Definition
a classification system that uses shared characteristics and ancestry to form groups
Term
What is the difference between an ecosystem and a community
Definition
a ecosystem is a community of organisms and their abiotic environment while a community is all of the organisms in a area
Term
7 abiotic components of an ecosystem
Definition
soil types - moisture levels - weather - climate
Term
Many of Darwin's ideas were developed from his observations during the voyage of the _______
Definition
Beagle
Term
T/F According to Darwin, individuals with traits better suited to their environment are more likely to survive
Definition
True
Term
T/F Darwin's theory of evolution by natural selection predicts that disadvantageous traits will become more common in a population over time
Definition
False
Term
What does evolution mean in biology
Definition
change in species over time
Term
how is the beak size affected in finches
Definition
type of food available to eat
Term
The major idea that Darwin presented in his book The Origin of species was that.......
Definition
species change over time by natural selection
Term
A trait that allows organisms to survive and reproduce better than others without the trait in a specific environment is an ____________
Definition
variation
Term
Speciation
Definition
the formation of a new species
Term
Gene flow
Definition
the movement of alleles into or out of a population due to migration
Term
Directional Selection tends  to eliminate what?
Definition
one extreme in a range of phenotypes
Term
Darwin conducted most of his research where?
Definition
the Galapagos Islands
Term
Mutation
Definition
spontaneous change in DNA leading to new traits
Term
Gene Flow
Definition
results from migration
Term
Genetic Drift
Definition
can result from a fire or landslide that leaves a few survivors of a population
Term
Non-random Mating
Definition
choosing a mate based on attributes
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