MPI U1 Practice Flashcards

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1
Q

Which sequence should be followed when conducting a laboratory investigation?

A

define a problem, form a hypothesis gather experimental data, form a conclusion

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2
Q

In a scientific investigation, after the question is designed, the next step is most likely

A

formulating a hypothesis

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3
Q

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

A

be repeated to verify the reliability of the data

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4
Q

In an experiment, the setup that provides a basis of comparison is known as

A

a variable

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5
Q

Which microscope part regulates the amount of light that reaches the objective lens?

A

diaphragm

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6
Q

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)

A

away and to the right

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7
Q

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

A

500

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8
Q

Small molecules combine chemically and form large, complex molecules by a process known as

A

synthesis

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9
Q

a hummingbird uses a considerable amount of energy. The energy most directly results from the life activity of

A

regulation

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10
Q

Which life function provides substances that may be used by an organism for its growth and for the repair of its tissues?

A

nutrition

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11
Q

What life process do you not need to do to survive

A

reproduction

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12
Q

The term that represents all the chemical activities that occur in an organism is

A

metabolism

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13
Q

A paramecium absorbs materials from its environment and circulates these materials throughout its cytoplasm. Which life function is described by these activities?

A

transport

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14
Q

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

A

homeostasis

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15
Q

What best describes the term theory as used in the gene-chromosome theory?

A

A theory refers to a scientific explanation that is strongly supported by a variety of experimental data.

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16
Q

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

A

field of vision is larger under low power than under high power

17
Q

What best describes an activity that will contribute to the maintenance of homeostasis in an organism?

A

A desert rattlesnake enters an underground burrow on a hot summer day.

18
Q

The Cell Theory

A
  • cells are the basic unit of life (building blocks)
  • cells carry out life processes
  • new cells come from pre-existing cells
19
Q

Exceptions

A
  • where did the first cell come from
  • viruses
  • mitochondria and chloroplasts