Review Session 1 “The Characteristics of Cells”

A _____ is the smallest functional and structural unit of all living organisms.

A cell is the smallest functional and structural unit of all living organisms.

An _______ is any living thing that carries out its own life processes.

An organism is any living thing that carries out its own life processes.

_______ ________ was the first to describe cells.

Robert Hooke was the first to describe cells.

Cells are small because their size is limited by their ______ ______ _______.

Cells are small because their size is limited by their outer surface area.

The surface area-to-volume ratio of a cell is the _______ of the outer surface to the cell’s volume.

The surface area-to-volume ratio of a cell is the ratio of the outer surface to the cell’s volume.

The _________ the cell, the greater this surface area-to-volume ratio.

The smaller the cell, the greater this surface area-to-volume ratio.

What is the cell theory?

What is the cell theory? All organisms are made up of one or more cells. The cell is the basic unit of all organisms. All cells come from existing cells.

Anton van Leeuwenhoek was the first to describe ______ _______.

Anton van Leeuwenhoek was the first to describe living cells.

Matthias Schleiden concluded that all ________ are made of cells.

Matthias Schleiden concluded that all plants are made of cells.

Theodor Schwann determined that all________ tissues are made of cells.

Theodor Schwann determined that all animal tissues are made of cells.

Rudolf Virchow proposed that cells could form only from the division of other _______.

Rudolf Virchow proposed that cells could form only from the division of other cells.

Organisms made up of just one cell are called __________ organisms.

Organisms made up of just one cell are called unicellular organisms.

The single cell must carry out all of the organism’s ______ _________.

The single cell must carry out all of the organism’s life functions.

Organisms made up of more than one cell are called __________ organisms.

Organisms made up of more than one cell are called multicellular organisms.

The cells of multicellular organisms have ___________ functions.

The cells of multicellular organisms have specialized functions.

A _________ ______ is a protective layer that covers a cell’s surface and controls materials moving into and out of the cell.

A cell membrane is a protective layer that covers a cell’s surface and controls materials moving into and out of the cell. In both unicellular and multicellular organisms.

The _________ is the region inside the cell that includes the fluid and all the organelles except for the nucleus.

In both unicellular and multicellular organisms The cytoplasm is the region inside the cell that includes the fluid and all the organelles except for the nucleus. In both unicellular and multicellular organisms

An _________ is a small body in the cytoplasm that is specialized to perform a specific function.

An organelle is a small body in the cytoplasm that is specialized to perform a specific function.

The ________ is a membrane-bound organelle that contains DNA.

The nucleus is a membrane-bound organelle that contains DNA.

DNA, or deoxyribonucleic acid, is _______ material that provides instructions for all cell processes found in the nucleus of all cells.

DNA, or deoxyribonucleic acid, is genetic material that provides instructions for all cell processes found in the nucleus of all cells.

____________ are single-celled organisms that do not have a nucleus or membrane-bound organelles.

Prokaryotes are single-celled organisms that do not have a nucleus or membrane-bound organelles.

Prokaryotes have organelles without cell membranes called ___________.

Prokaryotes have organelles without cell membranes called ribosomes.

Some prokaryotes have hairlike structures called ________ that help them move.

Some prokaryotes have hairlike structures called flagella that help them move.

__________ are organisms made up of cells that contain DNA in a nucleus, membrane-bound organelles, and ribosomes.

Eukaryotes are organisms made up of cells that contain DNA in a nucleus, membrane-bound organelles, and ribosomes.

Most eukaryotes are multicellular but some are ___________.

Most eukaryotes are multicellular but some are unicellular.