Life Is Thought to Have Evolved from Complex Molecules Formed

question 16

Multiple Choice

Life is thought to have evolved from complex molecules formed by the interaction of smaller molecules in oceans and the atmosphere.The substance which brought these molecules together to interact is

• A)hydrogen.
• B)acids.
• C)water.
• D)buffers.
• E)salts.

---

Definitions:

Perforation Plate

A structure found within the vessel elements of plants, characterized by a membrane or wall with holes that allow for the movement of water and solutes.

Vessel Elements

Component cells of the xylem tissue in plants that help in conducting water and minerals vertically through the plant.

Tracheids

Long, thin cells in the xylem of vascular plants that help in the transport of water and minerals, and also provide support.

Pits

Small depressions or cavities on a surface or in a structure, often found in fruits or in the landscape.