MPI U1 Practice Flashcards
Which sequence should be followed when conducting a laboratory investigation?
define a problem, form a hypothesis gather experimental data, form a conclusion
In a scientific investigation, after the question is designed, the next step is most likely
formulating a hypothesis
A student conducted an original, well-designed experiment, carefully following proper scientific procedure. In order for the conclusions to become generally accepted, the experiment must
be repeated to verify the reliability of the data
In an experiment, the setup that provides a basis of comparison is known as
a variable
Which microscope part regulates the amount of light that reaches the objective lens?
diaphragm
A protist is moving out of the field of vision of a microscope, as shown in the diagram. To keep the protist centered in the field, in which direction should the slide be moved? (it is located to the top right)
away and to the right
The low-power diameter of the field of a microscope is determined to be 1.5 millimeters. A slide of onion skin cells is put on the stage, and exactly 3 cells can be counted lengthwise across the diameter of the field. The average length of each cell is
500
Small molecules combine chemically and form large, complex molecules by a process known as
synthesis
a hummingbird uses a considerable amount of energy. The energy most directly results from the life activity of
regulation
Which life function provides substances that may be used by an organism for its growth and for the repair of its tissues?
nutrition
What life process do you not need to do to survive
reproduction
The term that represents all the chemical activities that occur in an organism is
metabolism
A paramecium absorbs materials from its environment and circulates these materials throughout its cytoplasm. Which life function is described by these activities?
transport
In a changing external environment, an organism must be able to maintain relatively constant internal conditions. This maintenance of a stable internal environment is known as
homeostasis
What best describes the term theory as used in the gene-chromosome theory?
A theory refers to a scientific explanation that is strongly supported by a variety of experimental data.
To locate a specimen on a prepared slide with a compound microscope, a student should begin with the low-power objective rather than the high-power objective because the
field of vision is larger under low power than under high power
What best describes an activity that will contribute to the maintenance of homeostasis in an organism?
A desert rattlesnake enters an underground burrow on a hot summer day.
The Cell Theory
- cells are the basic unit of life (building blocks)
- cells carry out life processes
- new cells come from pre-existing cells
Exceptions
- where did the first cell come from
- viruses
- mitochondria and chloroplasts
