Regents Biology Practice Questions

Which source would provide the most reliable information about the effects of antibiotics on disease-causing bacteria?

• a current professional science journal article on

  the control of disease

• a news program on national television about

  diseases in plants

• an article in a weekly news magazine about

  reproduction in viruses

• the local news section of a newspaper from 1993

Which statement describes the best procedure to determine if a vaccine for a disease in a certain bird species is effective?

• Vaccinate 100 birds and expose all 100 to the

  disease.

• Vaccinate 50 birds, do not vaccinate 50 other

  birds, and expose all 100 to the disease.

• Vaccinate 50 birds, do not vaccinate 50 other

  birds, and expose only the vaccinated birds to the

  disease.

• Vaccinate 100 birds and expose only 50 of them to

  the disease.

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A new concept that is tested in a scientific investigation

is known as

• an inference

• a theory

• an observation

• the hypothesis

Conclusions based on an experiment are most likely to

be accepted when

• they are consistent with experimental data and

  observations

• hypotheses are based on one experimental design

• they are derived from investigations having many

  experimental variables

• scientists agree that only one hypothesis has been

  tested

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Diagrams, tables, and graphs are used by scientists

mainly to

• organize data

• design a research plan for an experiment

• predict the independent variable

• test a hypothesis

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In an experiment to test the effect of exercise on the

number of times a clothespin can be squeezed in 1

minutes, the dependent variable would be the

• test subject

• number of squeezes

• clothespin

• amount of exercise

Which statement best explains why different phases of the Moon can be observed from the Earth?¿Qué enunciado explica mejor por qué se pueden observar diferentes fases de la Luna desde la Tierra?

• The size of the Earth's shadow falling on the Moon changes.

• The Moon moves into different parts of the Earth's shadow.

• Differing amounts of the Moon's sunlit surface are seen because the Moon revolves around the Earth.

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Why does the Moon have different phases when viewed by an observer on Earth?

• The moon rotates on an axis

• The earth's orbit is circular

• The moon revolves around the earth

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The diagram below shows the Moon orbiting Earth as viewed from space above the North Pole. The Moon is shown at eight different positions in its orbit.

At which two positions of the Moon is an eclipse of the Sun or Moon possible?

• full moon and new moon

• First and second quarter moon

• waxing and waning moon

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Which process is primarily responsible for the movement of water from the roots to the leaves in plants?

• Transpiration

• Photosynthesis

• Respiration

• Glycolysis