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Cell Theory Concepts

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Questions and Answers

What is one of the main ideas established by Rudolf Virchow in relation to cell theory?

Cells can arise spontaneously.

All cells contain identical genetic material.

Cells are the largest units of living organisms.

Cells only arise from the division of existing cells. (correct)

Which of the following statements is NOT a part of the cell theory?

Cells are the smallest unit of life.

Cells can survive without a membrane. (correct)

Cells arise only from pre-existing cells.

Living organisms are composed of one or more cells.

What do cells contain that is vital for their activities?

Genetic material that directs cellular functions. (correct)

Chloroplasts for energy production.

Mitochondria that absorb all nutrients.

A rigid structure for support.

What distinguishes cells from non-living structures?

Cells can perform chemical reactions. Signup and view all the answers

What is the smallest unit of life according to cell theory?

Cell. Signup and view all the answers

What term is used to describe organisms that are made up of a single cell?

Unicellular organisms Signup and view all the answers

Who was the first scientist to observe and name cells?

Robert Hooke Signup and view all the answers

How did Robert Hooke describe the appearance of cells he observed?

As empty boxes surrounded by walls Signup and view all the answers

What significant contribution did Anton van Leeuwenhoek make to microbiology?

He observed bacteria and protozoa for the first time. Signup and view all the answers

What does the term 'multicellular organisms' refer to?

Organisms made of multiple specialized cells Signup and view all the answers

What year did Theodor Schwann report that all animals are made up of cells?

1839 Signup and view all the answers

Why are multicellular organisms able to perform complex functions?

They have specialized cells that work together. Signup and view all the answers

Which of the following is NOT a characteristic of unicellular organisms?

They are always invisible to the naked eye. Signup and view all the answers