Annual growth rings are formed in woody

stems principally through the activities of the



a. cork cambium.
b. cortex.
c. vascular cambium.
d. apical meristem.
e. endodermis


C

Biology & Microbiology

You might also like to view...

Bacteriophage ? inserts into a bacterial chromosome using which of the following?

A. Nucleotide excision repair B. Endonuclease activity C. Site-specific recombination D. DNA gap repair

Biology & Microbiology

While researching the effects of light on chlorophyll synthesis in sorghum, you find that brief pulses of red light stimulates the synthesis of chlorophyll a and b. This would suggest that chlorophyll synthesis is directed by the Pr form of phytochrome.

Answer the following statement true (T) or false (F)

Biology & Microbiology

When amino acid tryptophan is readily available on the growth media, bacteria do not have to synthesize this molecule. Genes controlling this mechanism are under control of

A. A reproducible operon B. An inducible operon C. Catabolic repression D. Global regulation E. A repressible operon

Biology & Microbiology

Which of the following occur without coupling transport of the solute to the movement of a second solute?

(a) import of glucose into gut epithelial cells (b) export of Ca2+ from the cytosol (c) export of H+ from animal cells for pH regulation (d) the export of Na+from cells to maintain resting membrane potential Ion Channels and the Membrane Potential

Biology & Microbiology