What is determinate growth?
animals and some plant organs are either a defined juvenile or embryonic period or growth stops when a certain size is reached or a structure is fully formed
How can growth be indeterminate?
when cells continue to divide indefinitely
Do most plants have determinate or indeterminate growth?
What phenomenon sets plant cells apart from most animal cells?
plants cells (including fully differentiated types) have capacity to generate whole plant called TOTIPOTENT
What does it mean when cells are totipotent
plants cells (including fully differentiated types) have capacity to generate whole plant
What are meristems?
regions where growth in plants occurs as it is composed of undifferentiated cells undergoing active cell division
What are apical meristems?
primary meristems found at tips of stems and roots
Where are shoot apical meristems found?
top of the stem
What kinda of meristems do many dicotyledonous plants also develop?
What do undifferentiated cells in the meristem allow?
How do cells in meristems produce more cells?
by dividing by mitosis and cytokineses
What is the root apical meristem responsible for?
growth of the root
What do shoot apical meristems produce?
throws off the cells that are needed for growth and produces cells that grow leaves and flowers
What type of meristems can be found in plants?
apical and lateral
How does the differentiation of meristem cells cause the growth of the plant?
For each division, one cell remains in the meristem while the other one grows in size and is pushed away from th region
What kinda of meristems can apical meristems produce?
protoderm, procambium and ground meristem
what tissue does protoderm produce?
What tissue does procambium produce?
What tissus does ground meristem produce?
What is leaf primordia?
Small bumps at the side of shoot apical meristem that will develop into leaves
What is this called?
What controls the growth in shoot appex?
What is hormone?
chemical message produced and released in one part of an organism to affect another part
What are auxins?
hormones that can initiate growth of roots, influence development of fruits and regulating leaf development
What is the most abundant auxin?
What role does IAA have?
controls growth in shoot apex; promotes elongation of cells in stems
Where is IAA synthesized
in the apical meristem of the shoot and transported down the stem to stimulate growth
What can high concentrations if IAA cause?
it can inhibit growth at nodes
What are axillary buds?
shoots that form the junction/node of the stem and base of a leaf
What is apical dominance?
As shoot apical meristem grows and forms leaves, regions of meristem are left behind at the nodes. Growth at nodes is inhibited by auxin