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29 Cards in this Set

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  • Back
species
a group of organisms that have the same characteristics and are able to produce offspring that can reproduce
compound microscope
microscope having more than one lens.
cell theory
theory stating that the cell is the basic unit of all living organisms,and only living cells can produce new living cells.
nucleus
part of a cell that controls activities of other cell parts.
chromosome
string like structure in a cell nucleus that carries information controlling all the cells activities.
cell membrane
thin outer layer covering thaat holds a cell together.
cytoplasm
clear;jellylike material that fills the space between the cell membrane and the nucleus.
mitochondria
organelles where food and oxygen react to release energy.
vacuole
saclike organelle used for storing materials
endoplasmic reticulum
organelle that transports materials inside the cell.
ribosome
organelle that pulls together proteins for the cell.
chloroplast
organelle that makes sugars, using carbon dioxide, water,and the energy from sunlight.
chlorophyll
green substance in the cholor phasts that traps energy from sunlight.
cell wall
tough, nonliving material that acts like an outside skeloton for each plant cell.
mitosis
the process by which a cell produces two new identical nuclei.
cell division
the dividing of a cell following mitosis.
asexual divison
reproduction by one parent.
sexual reproduction
reproduction by two parents.
sex cell
a type of cell produced only by an organosm that reproduces sexually.
meiosis
the process by which sex cells form.
fertilization
the joining of an egg of an egg cell and a sperm cell during sexual reproduction.
zygote
the first cell of an offspring, formed when an egg cell and a sperm cell join.
traits
characteristic of an organism.
DNA
the moecule in each cell that directs the cell's activities.
gene
a section of DNA on a chromosome that controls a trait.
bases
one kind of molecule that makes up a DNA strand.
heredity
the proces by which traits are passed from parents to offspring.
inherit
to receive from one's mother or father.
dominant gene
a gene that prevents the expression of another gene.