Describe the difference between cohesion and adhesion, and how they combine to allow water to move
upward in plants.
What will be an ideal response?
Cohesion is the resistance of a molecule to separate, where adhesion is the ability of molecules to stick
to surfaces. Cohesion in water is the resistance to separate due to the hydrogen-bond lattice. Adhesion
in water is the ability of hydrogen bonds to form with charged and polar groups associated with
surfaces. A water column in a plant is a result of cohesion – water molecules being held together – and
maintained by water adhering to the walls of the water conducting tissue (xylem).
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One of the most important roles of proteoglycans is to trap ________.
Fill in the blank(s) with the appropriate word(s).
Flowering plants use animals or wind to transfer ________ between flowers.
A. megaspores B. seeds C. pollen D. microspores E. ovules
________ are lymphocytes that originate in the bone marrow but then mature in the thymus
Fill in the blank(s) with correct word
What is the term given to a group of individuals belonging to the same species that live in a defined geographic area that actually or potentially interbreed?
A) population B) consanguinity C) cytogenetics D) genetics E) hybrid vigor