The cohesion-tension theory in plants requires all of the following except
a. adhesion of water molecules to cellulose
b. cohesion between water molecules
c. evaporation of water molecules
d. energy to transport through xylem cells

The correct answer is option - adhesion of water molecules to cellulose.

Explanation:

The cohesion tension theory is a explanation for the flow of the water upwards in the plants through xylem. The driving force for this is mainly attraction force which is accountable for the surface tension in water which leads to pull water from roots to plants to leaf through xylem.

The lose of water is constant in plants is takes place by transpiration which involves cohesion of water molecule to pull another water molecule. Cohesion is a attraction force in between water and water. Another attraction force involve in the process is the adhesion in between water and the vessels not the cellulose.

Thus, the correct answer is option - adhesion of water molecules to cellulose.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.