cell theory

Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge?

•  All living things are made of cells.
• All cells come from other preexisting cells.
• Cells form through spontaneous generation.
•  Cells are the basic structural and functional units of life.
  

Why couldn't humans see cells before the 1600's?

• Because there were no jails
• Because microscopes hadn't been invented yet
• Cells were too big to be around humans.
• they didn't exist until 1600

Which of the following scientists was the first to observe bacteria?

• Anton van Leuwenhoek

• Matthais Schleiden

• Robert Hooke

• Theodor Schwann

The invention of the microscope made it possible for people to discover and learn about

• Plants

• Skin

• Animals

• Cells

When cells are damaged, new cells are created by cell division. How does the cell theory support this fact?

• It states that all cells have a nucleus which divides.

• It states that all living things are made up of one or more cells.

• It states that cells come from previously existing cells.

• It states that the basic units of structure and function are cells.

Who was the "scientist" who observed pond water and teeth scrapings in his microscope?

• Hooke

• Leeuwenhoek

• Schleidian

• Virchow

What was Schleiden convinced of? 

• All plants are made of cells
• All animals are made of cells
• All cells form spontaneously
• None of the above

Tags

NGSS.MS-LS1-1

Who noted that animals are made of cells and concluded that all living things are made of cells and cell products? 

• Rudolf Virchow
• Anton van Leeuwenhoek
• Theodor Schwann
• Robert Hooke

Tags

NGSS.MS-LS1-1

Who discovered that cells come from preexisting cells and whose research lead to the major principles of cell theory?

• Matthias Schleiden
• Robert Hooke
• Zacharias Janssen
• Rudolf Virchow

Who finally disproved Spontaneous Generation?

• Redi

• Needham

• Spallanzani

• Pasteur