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biology exam lrei margret magee 9th grade cards flash
What are the basic units of life called?
What three things does the cell theory state?
1. ALL LIVING THINGS ARE MADE UP OF CELLS
2. CELLS ARE THE BASIC UNITS OF STRUCTURE AND FUNCTION IN LIVING THINGS
3. NEW CELLS ARE PRODUCED FROM EXISTING CELLS
How do microscopes work?
MICROSCOPES use lenses to magnify the image of an object by focusing light or electrons.
What is the name for the thin flexible barrier that surrounds cells?
the CELL MEMBRANE.
What is the term for the large membrane enclosed structure that contains genetic material in the form of DNA and controls many cell activities?
What type of cell encloses its DNA in nuclei?