Unicellular Adaptations
What cell part does an amoeba use for locomotion?
Psuedopod
What is the fundamental difference between prokaryotic and eukaryotic cells?
Prokaryotic cells do not have a true nucleus or membrane-bound organelles.
Which cell organelle contains instructions for making proteins?
Nucleus
How do the DNA and genes in a muscle cell compare to the DNA and genes in a nerve cell?
The DNA is the same, but different genes are activated
A plant's _______ are mainly composed of cells that are specialized for light penetration and the regulation of gas exchange.
Leaves
What is the function of the eyespot?
It detects light, which allows the euglena to obtain energy and make food.
Prokaryotic cells do not have a nucleus, mitochondria, or other membrane-bound organelles, but they can possess... (3 answers)
cell membrane, ribosomes, cytoplasm
What is the purpose of the cell membrane?
encloses the cell and regulates the passage of materials between the cell and its environment
What type of cells possess a large quantity of mitochondria? (2 answers)
Sperm Cells or Muscle Cells
During a cell's development, it differentiates. How does differentiation occur?
Certain genes are turned on and others are turned off; this action produces adult cells that are specialized.
Which of the following best explains the function of a contractile vacuole?
maintains homeostasis by regulating an organism's water content
What's the difference between prokaryotic and eukaryotic DNA's shape and location?
Prokaryotic cells have circular DNA floating in the cytoplasm, whereas eukaryotic cells have linear DNA inside the nucleus
Which of a cell's organelles releases energy stored in food?
Mitochondria
Which cell is specialized for transporting oxygen?
Red Blood Cells (RBCs)
Some prokaryotes and eukaryotes have whip-like projections that help propel the cell through liquid. What is the name of this whip-like projection?
Flagella (Flagellum)
The presence of a nucleus suggests that Euglena are...
Eukaryotic
How does the size of a eukaryotic organism normally compare to the size of a prokaryotic organism?
Eukaryotes are usually much larger than prokaryotes.
Cells have particular structures that perform specific jobs. These structures are known as _______.
Organelles
Through what process do cells become specialized so they can perform specific functions within organisms? (starts with a D)
Differentiation
The life forms exhibiting the simplest cellular structure are _______.
Prokaryotes
An amoeba engulfs its food by....
Endocytosis
Some examples of eukaryotic cells are... (4 answers)
Plants, Animals, Fungi, Protists
Which organelle is not found in animal cells?
Cell wall
Many scientists believe that stem cells might be useful for treating certain human diseases in the future. Stem cells are cell that...
have the potential to differentiate into various specialized cell types.
What type of cell specializes in transmitting signals?
Nerve Cells