The video explains multicellular organisms, focusing on humans and birds as examples. It highlights that humans have 80 trillion cells, with over 200 specialized types performing various functions. The video also discusses how non-microscopic organisms like plants and animals are multicellular, emphasizing the complexity and specialization of cells in these organisms.

What is a key characteristic of multicellular organisms compared to unicellular ones?

• They are always microscopic.

• They do not have specialized cells.

• They have only one cell.

• They have many cells.

Approximately how many cells does a human body have?

• 80 billion

• 80 trillion

• 80 million

• 80 thousand

What is the role of specialized cells in the human body?

• To replicate unicellular functions

• To reduce the number of cells

• To perform a specific task

• To perform a variety of tasks

How many different types of cells are there in the human body?

• Exactly 150

• Less than 50

• About 100

• More than 200

Which cells are involved in the function of the eye?

• Only nerve cells

• Only eye cells

• Only muscle cells

• Nerve, eye, and muscle cells

What is necessary for the heart to perform its function?

• Only muscle cells

• Only blood cells

• Only nerve cells

• Nerve and muscle cells

Which of the following is NOT typically a multicellular organism?

• Bird

• Elephant

• Horse

• Bacteria

What is a common feature of multicellular organisms?

• They have only one type of cell.

• They have many different types of cells.

• They do not have specialized cells.

• They are always microscopic.

Why is a bird considered a multicellular organism?

• It has many different types of cells.

• It is microscopic.

• It has only one cell.

• It does not have specialized cells.

What allows a bird to perform functions like flying and eating?

• Not having specialized cells

• Being a unicellular organism

• Having many different types of cells

• Having only one type of cell