Characteristics and Organization of Cells

The video introduces unicellular and multicellular organisms. Unicellular organisms consist of a single cell and can be either eukaryotic or prokaryotic. Examples include bacteria, euglena, and paramecium. Some live in extreme environments. Multicellular organisms have multiple cells, are eukaryotic, and include frogs, dogs, and humans. They start as a single cell that multiplies and specializes into tissues, organs, and organ systems. The video concludes with a summary of these concepts.

Which of the following is a characteristic of unicellular organisms?

• They all have a nucleus.

• They can be either eukaryotic or prokaryotic.

• They have multiple cells.

• They are only found in extreme environments.

What type of environment can some unicellular organisms live in?

• Deserts

• Forests

• Hot springs

• Oceans

Which of the following is true about multicellular organisms?

• They start as multiple cells.

• They do not have specialized cells.

• They are all prokaryotic.

• They are all eukaryotic.

How do cells in multicellular organisms become specialized?

• By remaining identical

• Through random changes

• By multiplying and differentiating

• By losing their nucleus

What is the correct order of organization in multicellular organisms?

• Organ systems, organs, tissues, cells

• Organs, tissues, cells, organ systems

• Tissues, cells, organ systems, organs

• Cells, tissues, organs, organ systems