Quiz 1: Scientific Method and Cytology

A student constructs several terrariums like the one shown to determine the best amount of sunlight on plant growth . Each terrarium is exposed to a different amount of sunlight each day. What would be the independent variable in this experiment?

1. 
   

• • The size of the terrarium

• • Plant growth

• • The amount of sunlight

• • There is no independent variable in this experiment.

  
  

The student investigated the movement of water through plants.  He collected three plants for the investigation. Plant 1 

had zero leaves, Plant 2 had five leaves and Plant 3 had ten leaves.  The plants were covered with clear plastic to capture 

any water released into the air.  The plants received the same amount of water and sunlight. The table shows the student’s 

experimental design and the collected data. 

What would be the best conclusion for this experiment?

• • The number of leaves on a plant plays a role in the amount of water released into the air. 

• • The amount of water a plant receives plays a role in the amount of water released into the air. 

• • The amount of sunlight a plant receives plays a role in the amount of water released into the air. 

• • Leaving a plant uncovered plays a role in the amount of water released into the air. 

  
  

Which sentence best states the importance of using control groups?

• Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.

• Control groups eliminate the need for large sample sizes, reducing the number of measurements needed.

• Control groups eliminate the need for statistical tests and simplify calculations.

• Control groups provide a method by which statistical variability can be reduced.

Which organelle is responsible for making proteins in our bodies?

• Nucleus

• Smooth ER

• Cell Membrane

• Ribosomes

When looking through a microscope, you observe a cell that has cytoplasm and a cell wall. Which structure would you look for to determine if the cell is prokaryote or eukaryote?

• ribosomes

• cell membrane

• DNA

• nucleus

This structure contains Deoxyribonucleic Acid (DNA).

• Ribosomes

• Cell Wall

• Rough ER

• Nucleus

The graphs show the results of two separate experiments on the same species of plant. Students now want to determine how the use of rainwater or bottled water affects the growth of this plant. Which conditions should be used for optimal (best) growth as the two water types are tested?

• 20°C, 10 mL/day

• 25°C, 35 mL/day

• 30°C, 45 mL/day

• 35°C, 20 mL/day

Which type of cell is described below?

Description of Cell

small

less complex

does not contain a nucleus

evolutionary older cell type

contains ribosomes (make protein)

bacteria contains this cell type

• Prokaryote

• Eukaryote

Streptococcus pneumonia is a bacteria that is responsible for causing strep throat. In order for a person to be infected, the bacteria needs migrate (move) towards the throat and tonsils. Which structure found within a bacteria helps it to "move"?

• Nucleoid

• Flagella

• Nucleus

• Cell Wall

Which type(s) of cells contain DNA?

• • Plant cells

• Animal Cells

• Bacteria cell

• All cells listed contains DNA