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*Introduction to Cells

Name: __________________________________
Class: ___________________ Date: ___________

Across
The cell _____ controls which substances pass into and out of a cell.
A microscope that uses two lenses at once is called a/an _______ microscope.
Transport _____ "pick up" specific molecules and carry them across the membrane.
Clear, gel-like fluid that fills the region between the cell membrane and the nucleus.
The endoplasmic _______ is a network of membranes that produces many substances.
A process that allows large particles to leave the cell.
Sugars and starches are ______.
Makes food for cells using energy from the sun.
Where ribosomes are made.
A plant's cell _____ helps protect and support the cell.
Explanation of the relationship between cells and living things is the cell ________.
Tiny cell structures that carry out specific functions within a cell.
Some microscopes use a beam of ______ instead of light.
______ transport is the movement of materials across a cell membrane using cell energy.
Organs working together are called an organ _______.
In a multi-cellular organism, a group of cells working together.
Down
The diffusion of water molecules across a selectively permeable membrane.
Grain-shaped organelles that produce proteins.
An instrument to make small objects appear larger.
A group of proteins knows as _____ speed up chemical reactions in living things
Cell membrane consists mostly of _______.
Two or more elements chemically combined.
DNA is one kind of _______ ______.
The process by which molecules move from an area of higher concentration to an area of lower concentration.
The cell's control center.
The _____ convert energy stored in food to energy the cell can use.
The degree to which two separate structures that are close together can be distinguished is called ______.
Organelle that breaks down food particles and worn out cell parts.
The ______ Apparatus packages and distributes materials.
Stores water, food, waste products or other materials.
The basic unit of structure and function in living things.
Your brain, lungs and kidneys are examples of _____.
The shape of DNA is a double ______.