Biology

Which invention from the 17th century allowed for the development of modern cell theory

• X-rays

• computers

• the light microscope

• the scanning electron microscope

If a company claims that its product has been proven scientifically, which of the following should have taken place if the results are to be considered reliable?

• The company should have held discussions with leading industry scientists

• Technology should have been used in both the gathering of data and data analysis

• Results should have been peer reviewed and repeated producing the same findings.

• The results of the investigation should have been published in popular magazine

Based on your knowledge of scientific investigations, which stage of scientific investigation did the invention of the microscope significantly advance

• Communicating the results of experimentation

• Gathering the data for the investigation

• Generating explanations of phenomena

• Planning the investigation and experimentation

A student is conducting an investigation to determine the effect of temperature on the metabolism of yeast. Yeast and sugar are added to water, the gas pr4oduced is captured, and its volume is recorded. Which variables should be held constant during the investigation.

• Mass of sugar and water temperature

• Mass of yeast and mass of sugar

• Volume of gas and water temperature

• volume of gas and mass of yeast

Scientific law and a scientific theory are similar in that both.

• are based on what we expect to happen based on natural history

• describe the events that can be observed in nature

• explain why events and conditions occur as they do in the natural word

• represent a large amount of scientific investigation and evidence

Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music.

Which component is missing from Carmen’s experiment?

• a question

• a hypothesis

• a control group

• a description of the experiment

A research group has discovered that damselflies, a type of dragonfly, are being infected by a particular type of aquatic protozoan. Both young and adult damselflies are not directly infected by the protozoan but contract the infection from the prey they eat. The graph shows the percentage of adult damselflies infected by protozoans during the summer and early fall.

Which of the following conclusions is supported by the graph?

• A. Infection in embanked ponds increased during the sampling period.

• Protozoans were more common in creek-fed ponds than embanked ponds.

• Protozoans reproduce more quickly in embanked ponds than creek-fed ponds.

• Infection in creed-fed ponds remained constant throughout the sampling period.

A scientist performs an experiment to see if acids have an effect on the health of a particular type of plant. Three sets of plants were treated with acidic solutions of known pH while the control set was treated with a solution of neutral pH 7.

Which is the best conclusion for this experiment?

• Acid has no effect on the health of this type of plant.

• High acidity is helpful to this type of plant.

• Low acidity is harmful to this type of plant.

• High acidity is harmful to this type of plant.

Which of the following best summarizes why the technological invention of microscopes was important to biology

• It allowed for the development of the cell theory

• It created a means of funding for cell research

• It created public interest and support for research

• It gave scientific creditability to those working on cell theory

Early elements of the cell theory followed soon after the development of Hooke's light microscope. What does this relationship suggest about the evolution of the cell theory since Hooke?

• Improvements in technology are closely related to changes in the cell theory

• Isolated scientist contributed pieces of the cell theory to form the whole.

• Progress on the cell theory was delayed by a lack of technological progress.

• Scientist needed to focus less on cells and more on microscope development.