On a short-term basis, water loss in plants may be controlled by the
A. opening the Casparian strips in the roots.
B. closing of the stele in the roots.
C. bending of the petioles on the leaves.
D. opening of the stomata in the leaves to allow more carbon dioxide to enter.
E. closing of the stomata in the leaves to limit transpiration.
Answer: E
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A slime coat called peptidoglycan covers the walls of many bacteria
Indicate whether the statement is true or false.
____ are responsible for separating
chromosomes during cell division.
a. Microfilaments. b. Intermediate filaments. c. Actin filaments d. Microtubules e. Microfibers
The resting potential of a neuron results from a:
a. neutral charge in the cytosolic and extracellular fluids. b. negative cytosolic charge relative to the extracellular fluid. c. positive cytosolic charge relative to the extracellular fluid. d. fluctuating cytosolic charge and constant extracellular charge. e. constant cytosolic charge and fluctuating extracellular charge.
The infective stage of the Giardia spp. is:
A. The Oocyst B. The trypomastigote. C. The Trophozoite D. The Cyst E. The Sporozoite