Chapter 28 Flashcards
The movement of molecules through organisms due to pressure differences at rates beyond those possible by diffusion across a concentration gradient.
bulk flow
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
Gap junctions
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.
plasmodesmata
A discrete population of actively dividing, totipotent 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.
meristem
A fluid-filled ball of undifferentiated cells formed after the fertilized egg has undergone several rounds of mitotic cell division following the morula stage.
blastula
A layered structure formed when the inner cell mass cells of the blastocyst migrate and reorganize.
gastrula
he short name for evolutionary-developmental biology, a field of study that compares the genetic programs for growth and development in species on different branches of phylogenetic reconstructions.
evo-devo
What are the basic things any living cell needs to do survive?
b
How many times did multicellularity evolve? What groups of organisms are multicellular?
b
How do multicellular organisms get energy for their bodies? How do they disperse it amongst their cells? How do they deal with the waste products?
b
How can multicellular organisms coordinate the activities of their cells and body?
b
