Which of the following statements is true regarding the vascular cambia of ancient (extinct) lycophytes? Select all correct choices
A. Ancient lycophytes did not possess
vascular cambia.
B. Ancient lycophytes had vascular cambia
that formed only secondary phloem.
C. Ancient lycophytes had vascular cambia
that formed only secondary xylem.
D. Ancient lycophytes had vascular cambia
that formed both secondary xylem and
secondary phloem.
C
You might also like to view...
Which of the following statements describes how root meristems differ from apical meristems in plants?
A. Cells in root meristems have determinate growth. B. Root meristems are shielded by a root cap that protects cells from abrasion by the soil. C. Cells in root meristems are adjacent to the zone of maturation. D. Cells in root meristems are stimulated by hormones other than auxin.
HIV carries an enzyme called reverse transcriptase, which functions to ________
a. penetrate the cell membrane b. copy viral RNA into viral DNA c. copy viral DNA into viral RNA d. destroy the host cell genome
In an isotonic contraction of a skeletal muscle,
a. the tension in the muscle increases. b. movement occurs. c. no movement occurs. d. both a and c occur.
What part of the brain sorts incoming information into categories before relaying it to the cerebral cortex?
What will be an ideal response?