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Life Science; Chapter 3

Across
Mean "Many Cells"
A group of organs working together to perform a particular function is called an ___.
DNA is closed inside an organelle called the ___.
An organism made of cells that have a nucleus enclosed by a membrane.
An organism made of a single cell is called a ___.
The smallest unit that can perform all the processes necessary for life.
The first person to describe cells.
Organelles that contain digestive enzymes.
A protective layer that covers the cell's surface and acts as a barrier.
Anything that can perform life processes by itself is an ___.
A small sac that surrounds material to be moved into or out of a cell.
Down
The job the part does.
The organelle in which sugar is broken down to produce energy.
A group of cells that work together to perform a specific job.
Plants and algae have cell walls made of a complex sugar called ___.
The organelle that packages and distributes proteins is called the ___.
All cells contain ___ at some point in their life.
A structure that is made up of two or more tissues working together to perform a specific function is called an ___.
Single-celled organisms that do not have a nucleus or membrane-bound organelles.
Live in places where conditions are extreme.
A web of proteins in the cytoplasm.
The arrangement of parts in an organism.
Structures that perform specific functions within the cell.
Organelles that make proteins.
A rigid structure that gives support to a cell.