Cell structure and Function

1.What is structural unit of a living thing?

• Cell

• Molecule

• Atom

• Element

Choose the highest level of organization.

• Tissues

• Organs

• Cells

• Organ System

3. Matter is made up of ____________________.

What is a Cell?

• Cell is defined as the smallest structural and functional unit of an organism that is capable of performing life functions.

• part of the body's immune system. They help the body fight infection and other diseases.

• the hereditary material in humans and almost all other organisms.

What is unicellular cells?

What does the picture show.

• DNA

• RNA

• Neuron

• Smooth muscle cell

Do You think

Man is an ocean of

Cells?

Justify.

• They can survive working with other single

  celled organisms.

• Big animals have more number of

  cells than small animals but the size

  of their cells are similar

• Human body is made up of variety of cells which are different in

  their structure and they perform various function

Who was the first man to discover Cells?

• Schleiden

  & Schwann

• Robert Hooke

• Virchow

Which one of the following represents the correct level of organization ranging from simplest to most complex?

• Cells --> Tissues--> Organs--> Organ systems -->

  Organisms

• Tissues--> Organs--> Cells--> Organisms -->

  Organ system

• Cells--> Tissues--> Organ system--> Organisms-->

  Organs

Cell theory was given by:

• Charles Darwin

• Theodor Schwann

• Matthias Jakob Schleiden

• Both [b] and [c]