Which of the following is the pathway for water transport in a plant?
Select one:
a. root hairs ? cortex ? vascular cylinder ? leaves
b. root hairs ? pith ? endodermis ? xylem ? leaves
c. epidermis ? cortex ? phloem ? root
d. epidermis ? pericycle ? cortex ? xylem ? leaves
e. root hairs ? endodermis ? leaves ? xylem ? pith
a. root hairs ? cortex ? vascular cylinder ? leaves
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In the sequence of permeability changes for a complete action potential, the first of these events that occurs is the _____
A) activation of the sodium-potassium "pump" B) inhibition of the sodium-potassium "pump" C) opening of voltage-gated sodium channels D) closing of voltage-gated potassium channels E) opening of voltage-gated potassium channels
The trait of having more than ten fingers or toes is called
a. syndactyly. b. polydactyly. c. campodactyly. d. multidactyly. e. extradactyly.
The spindle apparatus is composed of ____________________.
A. Golgi bodies B. microtubules C. endoplasmic reticulum D. nucleoprotein E. chromatids
Which of the following is the most common parasitic worm in the United States?
A) Taenia saginata B) Echinococcus granulosus C) Schistosoma mansoni D) Enterobius vermicularis E) Ascaris lumbricoides