From Molecules to Organisms: Structures and Processes: Cons

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

Cells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell membrane against the concentration gradient. How do these molecules get into the cell?

• passive transport by diffusion
• active transport using ATP
• passive transport by osmosis
• phagocytosis

Which type(s) of cells have genetic material that is contained in a nucleus?

• both bacteria and fungi cells
• only animal cells
• only protist cells
• both plant and animal cells

Which structures are common to all cells?

• golgi apparatus and ER
• plasma membrane and DNA
• flagella and cilia
• mitochondria and chloroplast

What is the study of organisms at the early stages of development?

• DNA studies
• embryology 
• extinction
• fossil record

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

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.

Which invention from the 17th century allowed for the development of modern cell theory?

• x-rays
• computers
• the light microscope
• the scanning electron microscope

To help patients replenish bodily fluids quickly during an illness, doctors need to understand how cells behave in their environment. Doctors have confidence in what they know about how cells behave because:

• cell theory has been tested, refined, and observed to be true over hundreds of years

• large medical institutions have conducted their own experiments justifying cell theory

• the basics of cell theory have not changed much since the original experiments

• what we know about cell theory has been published in reputable journals

Cells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell membrane against the concentration gradient. How do these molecules get into the cell?

• passive transport by diffusion
• active transport using ATP 
• passive transport by osmosis
•  osmosis