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Biology 11
1st test
22
Biology
11th Grade
09/26/2012

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Term

Describe the structure using the terms:

Double Helix

Sugar-Phosphate Backbone

 

Nitrogenous bases,Complementary base parings (A-T G-C)

Definition
The structue of dna is like a twisted ladder. The shape is a double helix. The sugar phosphate backbone is the runs of the ladder.
Term
What role does dna have in evolution
Definition
dna holds all gentic code for the developement of an organism
Term
Describe Mutation
Definition
Change in DNA sequence/pattern that affects genetic information
Term
Natural Selection
Definition
Individuals that are better suited to their environment will survive and reproduce successfully
Term
Genetic Drift
Definition
The change in the frequency of a gene
Term
Genetic Flow
Definition
The transfer of genes to one population to another
Term
Non-Random Mating
Definition
Any mating system that the males are not randomly assigned to females
Term

Explain Convergent Evolution

Give an example

Definition

the process in which unrelated organisms independently evolve, the structures are different but the function are the same

The wings of insects,birds,bats

the fuction is the same but the structure is different

Term

Divergent Evolution

Give an example

Definition

accumulation of differences between groups which can lead to the formation of a new species

Ex. Wolly Mammoth -----Elephant

Term

Speciation

Give an example *Do*

Definition
Term

Homeostasis

        Stay

Definition
When organisms can keep an stable internal environment
Term
Binomial Nomenclature
Definition

A 2 word naming system, scientific name always written in Italics.

1st word capilitaized, 2nd word lower-cased

Term
5 Kingdoms
Definition

Bacteria

Protists

Fungi

Pantae

Animalia

Term

Taxonomy Levels:

Kinky Ppeople Can Often Find Good Shoes

Definition
Kingdom, Phylum, Class, Order, Family, Genus, species
Term
Amino Acids of Rna
Definition

A-T

C-G

U-A

Term

Compare Gradual Change

to

Puncutated Equilibrium Model

Definition

Gradual: Species slowly, but continusly evolve over time

 

Equilibrium: Species stay the same for awhile, and then rapidly change

Term
Lamarck's Giraffe Theory
Definition
One giraffe would keep streching its neck out to reach the leaves higher up on the trees. Then when it mates and reproduces the off-spring will have long necks
Term
Darwin's Giraffe Theory
Definition
Because the leaves that Giraffe eat are high up in the trees, the longer Giraffes will get the most food, and so when it reporduces the genes for long necks will be passed on to the off-spring
Term
Evolutionary Relationships:
Definition
Method of grouping oraganisms together, according to their evolutionary history
Term
Homologous Structures:
Definition
Structures that have different mature forms in different organisms, but develope from the same Embronic tissues
Term
Embryological Relationships
Definition
comparing the embryo with other animals that share the same habitat to help taxonomists classify organisms
Term
Biochemical Relationships:
Definition
don't have definition
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