Plants transport water to their leaves through the xylem when water evaporates from the leaves. The evaporating water pulls other water molecules up the xylem through__________.

DNA and RNA contain functional units known as__________.

The simplest and the most common monosaccharide is a six-carbon sugar called__________.

Atoms of a single element that possess different numbers of neutrons are called__________.

Carbon has four valence electrons and oxygen has six. Carbon dioxide would contain __________.

Some proteins are embedded in the cell membrane. One such protein is an aquaporin that allows water to move across the membrane. What essential function of proteins does an aquaporin serve?

A suggested explanation that might be true and is subject to testing by further observations is

The nitrogenous base that is only found in DNA is and not in RNA is__________.

Water molecules are polar with ends that exhibit partial positive and negative charges. These opposite charges allow water molecules to attract each other through__________.

It is known that many trees lose their leaves in response to decreasing day length. As a result, you think that Gingko trees may also lose their leaves in response to decreasing day length. This statement is an example of