Opening and closing of the stomata:a
occur during prolonged periods of drought.
b. occur when there is a high concentration of carbon dioxide in the leaf.
c. are under hormonal control
d. are triggered by darkness.
e. are controlled by the changes in shape of the companion cells.
c
You might also like to view...
Sequencing technology and molecular phylogenetic analyses have had very little impact on our understanding of the evolution and diversity of life on Earth
Indicate whether the statement is true or false.
Asthma attacks result from contraction of the muscles surrounding the bronchioles.
Answer the following statement true (T) or false (F)
Common recessive alleles present in a family can result in a pedigree that looks like ____ inheritance
a. X-linked recessive b. X-linked dominant c. autosomal dominant d. autosomal recessive e. Y-linked
Due to recent changes in blood pressure guidelines, a reading of 120/80 is now considered to be:
a. a low normal reading. b. a high normal reading. c. prehypertensive. d. hypotensive (too low). e. very hypertensive (too high).