Cell and Life

Front

What is an organism made of only one cell called?

Back

Unicellular organisms are made up of a single cell, which performs all necessary functions for life.

Front

What characteristic of life is shown when an organism maintains a stable internal environment despite external changes?

Back

All living things maintain homeostasis, which is the ability to regulate internal conditions.

Front

What is the outermost layer of an animal cell that protects it from the environment?

Back

The cell membrane is the outer layer that protects the cell and controls what enters and exits.

Front

What characteristic of life is demonstrated by organisms having complex structures like organs and systems?

Back

All living things have different levels of organization, from cells to tissues to organs.

Front

Who proposed that all cells come from preexisting cells?

Back

Rudolf Virchow proposed that all cells arise from existing cells.

Front

What is the basic unit of life?

Back

The cell is the basic unit of life, making up all living organisms.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells do not have a nucleus or membrane-bound organelles, while eukaryotic cells do.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment.

Front

What are multicellular organisms?

Back

Multicellular organisms are made up of more than one cell, which can specialize for different functions.

Front

What is the function of the nucleus in a cell?

Back

The nucleus contains the cell's genetic material and controls its activities.