Theory

The cell is considered the basic unit of life. The Cell Theory was developed over time using contributions of several scientists working in different fields. Which of the following is NOT part of the Cell Theory?

• All cells contain a nucleus.

• The cell is the basic unit of life.

• All organisms are composed of cells.

• All cells come from preexisting cells.

The cell theory took hundreds of years to develop. The scientists over the years added their discoveries to the theory when they were able to scientifically prove their ideas. What aided in the development of the discoveries over the years?

• The organisms were able to grow larger after several decades, which allowed the scientists to see them clearer.

• The continued development of the microscope helped the scientists to see smaller organisms and their cellular structures.

• The scientists were able to think for themselves as time went on.

• The development of eyeglasses that were used helped scientists to look deeper into cell structures.

Which technology was essential for the development of the cell theory?

• Microwave

• Telescope

• Antiseptics

• Microscope

Which scientist added the third part of the cell theory which states, "All cells come from preexisting cells."

• Rudolf Virchow

• Robert Hooke

• Matthias Schleiden

• Theodor Schwann

The theory of evolution states that

• species change over time, sometimes developing into new species

• species that are extinct have no biological relationship to living species

• the environment of Earth is constant over time

• different animal species always interbreed to form new and different species

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Which of the following Best describes evolution?

• Rapid change within a species

• Gradual change over time

• A quick emergence of a new species

• Passing of Traits from parent to offspring

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The theory that organisms have slowly changed over time...

• fossil record

• relative dating

• evolution

• adaptation

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True or False: These are the characteristics of living things Living things are made of smaller building blocks called cells. Living things convert energy. Living things are able to reproduce. Living things grow and develop. Living things respond to their surroundings. Living things maintain homeostasis. Living things adapt over time.

• True

• False

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What does the Big Bang theory suggest?

• The universe was just there

• The Milky Way is the only solar system

• The universe is continually expanding

• The universe is collapsing in toward a single point

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Most scientists believe the Big Bang Theory explains which of the following questions?

• How our planets and moons formed

• How our universe began

• How the sun turns hydrogen into helium

• How fast light travels through space

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