Biology Test 3 - Cells
Why will external fluid flow into a plant cell?
- because the external salt concentration is less and the external water concentration is greater
List the Four Organ Systems which are operational in an amoeba.
- digestion - excretion - reproduction - respiration
Define: Organismal Theory
A functioning organism represents life
Define: Cytoplasm
All cellular material outside the nucleus
What gas diffuses passively out of the cell during cellular respiration?
Carbon dioxide (CO2)
Define: Nucleus
Control center of the cell
Define: Plasma Membrane
Controls what comes into and goes out of the cell
Define: Cell Theory
Each cell possesses a life of its own
True False: The taxonomic classification of all organisms is certain.
False
True or False Ribosomal RNA is produced in the cytoplasm.
False
True or False Simple cell division of both plants and animals is an identical process.
False
True or False Current scientific methods can conclusively distinguish between all microorganisms
False
Define: Organism
Functional plant or animal
Define: Vacuole
Large storage structures
Define: Cell Wall
Outer covering around plant cell made of fibrous material
What gas diffuses passively into the cell during cellular respiration?
Oxygen (O2)
Define: Nucleolus
Small structure(s) within nucleus
True or False The simplest operational cell is still more complex than a computer.
True
The plasma membrane of a human cell:
acts as a selective gatekeeper
Define: Epidermis
an outer covering of cells
What can some leukocytes absorb by the process of phagocytosis?
bacteria
According to the Cell Theory, what is the basic unit of life?
cell
The natural tendency of molecules to move from higher to lower concentration is:
diffusion
a leukocyte is responsible for:
fighting disease by phagocytosis or antibody production
Which way will water flow for the following external solutions?
hypertonic: out of the cell
What characteristic is completely unique about DNA?
it contains coded information
The relative concentration of water in a hypertonic solution is
low
The Krebs cycle takes place within the:
mitochondria
According to the organismal Theory, what is the basic unit?
organism
Any functional plant or animal with interrelated parts is considered as a(n)
organism
Which statements describe organisms referred to as "colonial"?
similar bacteria or protozoa which group together
