Bio 133 (Sapling-Quiz): Exam 1

Which statements about covalent bonds is true?

In a nonpolar covalent bond, the electrons are shared equally between 2 atoms

A few unidentified seeds were found in a sealed clay jar during an archaeological dig. Radiocarbon dating showed that the seeds were 725 years old. When the seeds were planted, plants brewed from them. Based on cell theory, what statements can confidently be made regarding these unidentified plants and seeds.

1. The cells in the seeds are still alive, so they produced new plant cells. 2. Both the seeds and mature plants are composed of cells.

Water has ...

A high specific heat which means it takes a lot of energy to change its temperature

Which is not a tenet of Cell Theory?

All cells contain DNA genome

Cell theory began to develop in 1839, following the research of Matthias Schleiden and Theodor Schwann into plant and animal tissues. Both the botanist Schleiden and the physiologist noticed that every organism they viewed under a microscope, whether plant or animal, was composed of cells. Their observations that all living species are made up of one or more cells led to early formation of cell theory. Which tenet of cell theory is described by the paragraph about the historical observations of cells?

All organisms are composed of one or more cells.

Which statements about teaching intelligent design in a science classroom is correct?

There is no scientific evidence to support intelligent design and therefore it should not be taught in science classes

What type of molecule is water and why?

Water is a polar molecule because oxygen and hydrogen have different electronegativities