Plant Bio Exam 2 Practice Questions

Bilateral (meaning not radial) symmetry or fused sepals and petals can

Be considered modern features of flowers and are likely the result of co-evolution between flowering plants and pollinators

Plant growth occurs within

Apical meristems, axillary meristems, lateral meristems

The cell type that helps to move water from roots to shoots

Xylem

In the angiosperm flower the pollen and the embryo sac represent the gametophytes (T/F)

True

De-differentiation is the process by which the somatic cells reactivate the cell cycle and develop new organs or entire organism (T/F)

True

In the root growth zone, cell division primarily occurs in

Meristematic zone

Pollen are

microgametophytes that give rise to and carry sperm cells

The leaf on the left represents a monocot plant, the leaf on the right a dicot plant (T/F)

True

Monocot or dicot?

Monocot (parallel veins

Monocot or dicot?

Neither, non flowering plant

Monocot or dicot?

Monocot

Monocot or dicot?

Monocot

The flower head of an Asteraceae flower represents just a single flower (T/F)

False

In vascular tissues, water movement is facilitated by

Xylem

Sieve element is a component of

Phloem

Collenchyma cells are dead at maturity (T/F)

False

Root hairs in plants originate from cortical cells (T/F)

True

Suberin, as secondary cell wall thickening, is present in

Roots and Stems

Lateral roots are initiated by de-differentiation of

Pericycle cells

Axillary meristems are speculated to develop from

Totipotent cells left in leaf axils from shoot apical meristems and de-differentiation of cells in the axils of leaves

Meristemoid cells in leaves remain undifferentiated while leaf expansion can develop into

Stomata, trichomes, pavement cell

Modifications of leaves

Traps in carnivorous plants, thick fleshy leaves in succulents, thorns in cactus, tendrils in vining plants

Polycarpic plants, flower and produce seed many times during their life cycle (T/F)

True

Which floral organs would develop in each whorl based on the indicated gene expression patterns?

Whorl 1-sepal, whorl 2-petal, whorl 3-petal, whorl 4-sepal

Archaic or modern features and why?

Archaic characteristics - no distinct sepals and petals, indefinite number of flower parts, radial symmetry