What is periderm?
A. Special epidermal cells that regulate gas exchange
B. Outer layer of the vascular cylinder in a plant root
C. Layers of cells just inside root endodermis
D. Dermal tissue that replaces epidermis on the surfaces of older stems and roots
E. Tissue that consists of densely packed dead cells with thickened, waxy walls
Answer: D
You might also like to view...
A portion of the Y chromosome is homologous to the X chromosome
Indicate whether the statement is true or false.
If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be
A. optifocal. B. parfocal. C. equifocal. D. totifocal.
The concept of the niche was initially developed by
A) Hutchinson. B) Brodie. C) Wetzel. D) Grinnell.
Phospholipid molecules that prevent the alveoli from collapsing are known as ________
A) laryngitis B) surfactant C) mucus D) plasma