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Biology Final Exam WILSON
Biology Semester 1 Final Exam
50
Biology
9th Grade
12/16/2013

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Term
benigin tumor
Definition
normal growth of cell, not cancerous
Term
biodiversity
Definition
variety of life within an area
Term
biology
Definition
scientific study of all forms of life
Term
cancer
Definition
a class of diseases characterized by uncontrolled cell division
Term
cell
Definition
basic unit of life
Term
cell plate
Definition
a "plate" diving the cell into two parts
Term
cell wall/ cellulose
Definition
rigid structure that gives protection, support, and shape to cells in plants, algae, fungi and bacteria
Term
centride
Definition
small cylinder shape organelle made of protein tubes arranged in circles
Term
centromere
Definition
region of condensed chromosome that looks pinched
Term
cleavage furrow
Definition
the pinch of an animal cell for cytokinesis
Term
crossing over
Definition
exchange of chromosome segments between homologous chromosomes in meiosis one
Term
cytokinesis
Definition
when the cells cytoplasm divides
Term
cytoplasme streaming
Definition
constant movement of cytoplasm
Term
dependent variable
Definition
experimental data collected though observation and measurement
Term
development
Definition
to grow and measure
Term
differentiation
Definition
when committed cells acquire the structures and functions of highly specialized cells
Term
diploid
Definition
cells that has copies of each chromosome
Term
DNA
Definition
molecules that store genetic info
Term
eukaryote
Definition
cell contain a nucleus and other structures enclosed within the membrane
Term
evalution
Definition
changing in species over time
Term
fertilization
Definition
fusion of a sperm and egg cell
Term
gene
Definition
spafic region of DNA that codes for a particular protein
Term
genetics
Definition
study of the heredity patterns and variations of organisms
Term
haploid
Definition
cells that only have 1 copy of each chromosome
Term
heredity
Definition
traits passing down from generation to generation
Term
histones
Definition
protein that organizes chromosomes and around which DNA wraps
Term
homestasis
Definition
regulation and maintenance of constant internal conditions in an organism
Term
homologous pair
Definition
a relationship with another homologue due to having ancestry
Term
independent variable
Definition
condition or factor that is multiplied
Term
karyotype
Definition
image of all the chromosomes in a cell
Term
malignant tumor
Definition
cancerous tumor
Term
meiosis
Definition
form of nuclear division that divides a diploid cell into haploid cells
Term
melabolism
Definition
all chemical processes that synthesize or brake down material
Term
microtubes
Definition
a very fine tubing with the cell
Term
mutation
Definition
change in DNA sequence
Term
multicellular
Definition
organisms that consist of more than one cell
Term
organelles
Definition
membrane bound structure that is specialized to preform a distinct process
Term
organism
Definition
any living thing
Term
phospholipid bilayer
Definition
a double layered cell membrane
Term
plasmolysis
Definition
contraction of the protoplast in a plant cell
Term
probability
Definition
likelihood that something will happen
Term
prokaryote
Definition
cell that dose not have a nucleus or other membrane bound organelles
Term
reproduction
Definition
the action or process of making something
Term
selectively permeable
Definition
only some but not all can pass threw
Term
somatic cell
Definition
cells that make up the bodes tissues and organs
Term
species
Definition
group of organisms so similar to each other they can breed
Term
synapsis
Definition
tiny gap between neverons through when chemical signals are sent
Term
unicellular
Definition
organism that consist of only 1 cell
Term
therory
Definition
proposed explanations for a wide variedty of observation and experiments
Term
zygote
Definition
cell that forms when a male gamete fertilizes a female gamete
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