Of the following, which is considered the most unifying theme in biology?
The best description of a hypothesis is
an explanation based on previous observations and used to predict further
a series of scientific observations that can be repeatedly reproduced.
a single hypothesis leads to formulation of a scientific theory
an explanation for observations which is strictly a "guess" by
Homeostasis may be described as
ability of the living body to reproduce.
the same as photosynthesis.
maintenance of a constant internal environment.
a continuous supply of energy for living things.
the responsibility of only the nervous system.
This evening, as you relax over a few cool, refreshing beverages, the
conversation with your friends drifts to what you've been studying in biology.
One of your friends says, "You know, I don't know how anyone can
believe that evolution stuff. After
all, it's just a theory." How
will you explain to her that scientists use the word 'theory' in a different way
than the general public does? (3
It is desirable that more than one individual be tested in an
experiment, or that the experiment be performed many times because
experimentation on just one individual may not give results which can be
applied to everyone.
the experimental individual may not be representative of the population
as a whole.
testing just once might produce results which are a 'fluke'.
all of the above are valid reasons for having a large sample size or
repeating an experiment.
Glands which lack ducts, but rather dump their secretions directly into
the blood are
A. sweat glands.
none of the above.
Which description(s) best matches an epithelium?
I. Blood vessels present.
II. Closely packed, tightly connected cells.
III. Fibers present in an intercellular matrix.
IV. Covers a body surface or lines a passageway or cavity.
V. Forms glands.
I and III only.
I, II, and V only.
II, IV, and V only.
I, II, IV, and V only.
I, II, III, IV, and.
Fat storage for energy, insulation, and a protective cushion are
Which term best describes the location of your chin compared to your
The diaphragm separates which body cavities?
Which is a TRUE statement for a healthy human body?
Internal conditions fluctuate widely from moment to moment.
Internal conditions are constant and unchanging.
Internal conditions are considerably different on any given day.
D. Internal conditions remain stable, but vary within limits.