Biology Chapter 1: Introduction to Cells

Questions and Answers

Eukaryotic cells have a nuclear membrane. (correct)

Eukaryotic cells lack organelles. (correct)

Prokaryotic cells have a defined nucleus.

Prokaryotic cells are larger than eukaryotic cells.

Theodor Schwann

Robert Hooke (correct)

Antoine Van Leeuwenhoek

Robert Brown

All organisms are made of cells. (correct)

All cells can perform photosynthesis.

Cells are the only unit that can reproduce independently.

All cells are prokaryotic in nature.

All plants are made of cells. Signup and view all the answers

Frog's eggs can be seen with the naked eye. Signup and view all the answers

The development of light microscopes. Signup and view all the answers

Robert Brown Signup and view all the answers

Cells exhibit specific specialties. Signup and view all the answers

Study Notes

Prokaryotic cells lack a nuclear membrane and membranous organelles.
Eukaryotic cells have a clear nucleus surrounded by a nuclear membrane and cell organelles, and are typically larger than prokaryotic cells.

The invention of the microscope by Antoine Van Leeuwenhoek (1632-1723) allowed for the discovery of cells.
Robert Hooke (1635-1703) was the first to use the term "cell" when describing the structure of oak tree cortex.
Robert Brown (1831) discovered the nucleus of the cell.
Mathias Schleiden (1838) concluded that all plants are composed of cells.
Theodor Schwann (1839) concluded that all animals are composed of cells.

Cell size varies, with the diameter of a frog's egg being 1 mm (visible to the naked eye).
Most cells are smaller than 1 mm, with human eggs being around 100 micrometers or less.
Cells have specialized structures to increase the efficiency of various functions.