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Cells: The Basic Units of Life

Across
An organism made of a single cell is called a _________ organism. (47)
a collection of tissues that carry out a specialized function of the body (50)
All _____ cells have a cell wall. (41)
the arrangement of parts in an organism (50)
in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration (46)
in a eukaryotic cell, a membrane-bound organelle that contains the cell’s DNA and that has a role in processes such as growth, metabolism, and reproduction (40)
______ ______ was the first person to describe cells. (33)
a rigid structure that surrounds the cell membrane and provides support to the cell (46)
a system of membranes that is found in a cell’s cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids (46)
one of the small bodies in a cell’s cytoplasm that are specialized to perform a specific function (40)
a group of similar cells that perform a common function (50)
cell organelle composed of RNA and protein; the site of protein synthesis (46)
a living thing; anything that can carry out life processes independently (50)
Down
In the late 1600s, a Dutch merchant named Anton van _________ studied many different kinds of cells. (33)
Eukaryotic cells are the ______ cells. (37)
____________ is a process by which plants use sunlight, carbon dioxide, and water to make sugar and oxygen. (44)
a small cavity or sac that contains materials in a eukaryotic cell (46)
A _________ organism is an organism made of many cells. (47)
in biology, the smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm. (40)
a group of organisms that work together to perform body functions (50)
The ____ ______ has three parts: 1. All organisms are made of one or more cells. 2. The cell is the basic unit of all living things. 3. All cells come from existing cells. (34)
a phospholipid layer that covers a cell’s surface; acts as a barrier between the inside of a cell and the cell’s environment (40)
Your body is made of ______ of cells. (38)
cell organelle that helps make and package materials to be transported out of the cell (46)
an organism that consists of a single cell that does not have a nucleus (40)
an organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include animals, plants, and fungi, but not archaea or bacteria (40)
a cell organelle that contains digestive enzymes (46)
the special, normal, or proper activity of an organ or part (50)