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Science Section 1
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13
Science
7th Grade
09/27/2011

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Term
What increases the number of cells and causes many celled organisms to grow?
Definition
cell division
Term
What is the Cell Cycle?
Definition
series of events that takes place from one cell division to the next
Term
What are periods of formation, growth, and death called (in a cell)?
Definition
life cycles
Term
In what stage is most of the life of any eukaryotic cell, or cell with a nucleus is spent in a period of growth and development
Definition
interphase
Term
During interphase the nucleus divides and then the cytoplasm does what?
Definition
separates to form 2 new cells
Term
What is the process in which the nucleus divides to form 2 identical nuclei
Definition
mitosis
Term
What is chromosome?
Definition
structure in the nucleus that contains hereditary material p
Term
What happense during Prophase?
Definition
-nucleolus and nuclear membrane disinegrate
-centrioles move to opposite ends of the cell
-spindle fibers begin to stretch across the cell
Term
What is it called when pairs of chromatids lined up across the center of a cell
Definition
metaphase
Term
What kind of "phase" is this?
-each centomeve divides
-each pair of chromatids separates and moves to opposite endes of the cell?
Definition
anaphase
Term
What is telophase?
Definition
spindle fibers disappear and a new nucleus forms
Term
In what kind of cell does the cell membrane pinch in the middle and the cytoplasm divides?
Definition
animal cell
Term
In what kind of cell does a cell plate form?
Definition
plant cell
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