Ch 26: Being Multicellular

Question 1

Bulk Flow

Answer 1

The movement of fluids over long distances through organisms due to pressure differences.

Question 2

Gap Junction

Answer 2

A type of connection between the plasma membranes of adjacent animal cells that permits materials to pass directly from the cytoplasm of one cell to the cytoplasm of another.

Question 3

Plasmodesmata

Answer 3

Connections between the plasma membranes of adjacent plant cells that permit molecules to pass directly from the cytoplasm of one cell to the cytoplasm of another.

Question 4

Meristem

Answer 4

A discrete population of actively dividing, totipotent plant cells; apical meristems are located at the tip of stems and roots and produce cells that allow plants to grow in length, while lateral meristems surround stems and roots and produce cells that allow growth in diameter.

Question 5

Blastula

Answer 5

A hollow ball of cells filled with fluid that develops from the morula and is an early stage during embryo development in animals.

Question 6

Gastrula

Answer 6

A stage of early embryo development in animals when cells of the hollow blastula migrate and reorganize to form a multilayered structure in which different cell types begin to differentiate.

Question 7

Evo-devo

Answer 7

The short name for evolutionary developmental biology, a field of study that compares the genetic programs for growth and development in different species in order to understand how diversity has evolved within and between groups.